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bspaans/python-mingus | mingus/midi/midi_file_in.py | MidiFile.parse_midi_event | def parse_midi_event(self, fp):
"""Parse a MIDI event.
Return a dictionary and the number of bytes read.
"""
chunk_size = 0
try:
ec = self.bytes_to_int(fp.read(1))
chunk_size += 1
self.bytes_read += 1
except:
raise IOError("Couldn't read event type "
"and channel data from file.")
# Get the nibbles
event_type = (ec & 0xf0) >> 4
channel = ec & 0x0f
# I don't know what these events are supposed to do, but I keep finding
# them. The parser ignores them.
if event_type < 8:
raise FormatError('Unknown event type %d. Byte %d.' % (event_type,
self.bytes_read))
# Meta events can have strings of variable length
if event_type == 0x0f:
try:
meta_event = self.bytes_to_int(fp.read(1))
(length, chunk_delta) = self.parse_varbyte_as_int(fp)
data = fp.read(length)
chunk_size += 1 + chunk_delta + length
self.bytes_read += 1 + length
except:
raise IOError("Couldn't read meta event from file.")
return ({'event': event_type, 'meta_event': meta_event,
'data': data}, chunk_size)
elif event_type in [12, 13]:
# Program change and Channel aftertouch events only have one
# parameter
try:
param1 = fp.read(1)
chunk_size += 1
self.bytes_read += 1
except:
raise IOError("Couldn't read MIDI event parameters from file.")
param1 = self.bytes_to_int(param1)
return ({'event': event_type, 'channel': channel,
'param1': param1}, chunk_size)
else:
try:
param1 = fp.read(1)
param2 = fp.read(1)
chunk_size += 2
self.bytes_read += 2
except:
raise IOError("Couldn't read MIDI event parameters from file.")
param1 = self.bytes_to_int(param1)
param2 = self.bytes_to_int(param2)
return ({'event': event_type, 'channel': channel, 'param1': param1,
'param2': param2}, chunk_size) | python | def parse_midi_event(self, fp):
"""Parse a MIDI event.
Return a dictionary and the number of bytes read.
"""
chunk_size = 0
try:
ec = self.bytes_to_int(fp.read(1))
chunk_size += 1
self.bytes_read += 1
except:
raise IOError("Couldn't read event type "
"and channel data from file.")
# Get the nibbles
event_type = (ec & 0xf0) >> 4
channel = ec & 0x0f
# I don't know what these events are supposed to do, but I keep finding
# them. The parser ignores them.
if event_type < 8:
raise FormatError('Unknown event type %d. Byte %d.' % (event_type,
self.bytes_read))
# Meta events can have strings of variable length
if event_type == 0x0f:
try:
meta_event = self.bytes_to_int(fp.read(1))
(length, chunk_delta) = self.parse_varbyte_as_int(fp)
data = fp.read(length)
chunk_size += 1 + chunk_delta + length
self.bytes_read += 1 + length
except:
raise IOError("Couldn't read meta event from file.")
return ({'event': event_type, 'meta_event': meta_event,
'data': data}, chunk_size)
elif event_type in [12, 13]:
# Program change and Channel aftertouch events only have one
# parameter
try:
param1 = fp.read(1)
chunk_size += 1
self.bytes_read += 1
except:
raise IOError("Couldn't read MIDI event parameters from file.")
param1 = self.bytes_to_int(param1)
return ({'event': event_type, 'channel': channel,
'param1': param1}, chunk_size)
else:
try:
param1 = fp.read(1)
param2 = fp.read(1)
chunk_size += 2
self.bytes_read += 2
except:
raise IOError("Couldn't read MIDI event parameters from file.")
param1 = self.bytes_to_int(param1)
param2 = self.bytes_to_int(param2)
return ({'event': event_type, 'channel': channel, 'param1': param1,
'param2': param2}, chunk_size) | [
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bspaans/python-mingus | mingus/midi/midi_file_in.py | MidiFile.parse_track_header | def parse_track_header(self, fp):
"""Return the size of the track chunk."""
# Check the header
try:
h = fp.read(4)
self.bytes_read += 4
except:
raise IOError("Couldn't read track header from file. Byte %d."
% self.bytes_read)
if h != 'MTrk':
raise HeaderError('Not a valid Track header. Byte %d.'
% self.bytes_read)
# Parse the size of the header
try:
chunk_size = fp.read(4)
self.bytes_read += 4
except:
raise IOError("Couldn't read track chunk size from file.")
chunk_size = self.bytes_to_int(chunk_size)
return chunk_size | python | def parse_track_header(self, fp):
"""Return the size of the track chunk."""
# Check the header
try:
h = fp.read(4)
self.bytes_read += 4
except:
raise IOError("Couldn't read track header from file. Byte %d."
% self.bytes_read)
if h != 'MTrk':
raise HeaderError('Not a valid Track header. Byte %d.'
% self.bytes_read)
# Parse the size of the header
try:
chunk_size = fp.read(4)
self.bytes_read += 4
except:
raise IOError("Couldn't read track chunk size from file.")
chunk_size = self.bytes_to_int(chunk_size)
return chunk_size | [
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bspaans/python-mingus | mingus/midi/midi_file_in.py | MidiFile.parse_varbyte_as_int | def parse_varbyte_as_int(self, fp, return_bytes_read=True):
"""Read a variable length byte from the file and return the
corresponding integer."""
result = 0
bytes_read = 0
r = 0x80
while r & 0x80:
try:
r = self.bytes_to_int(fp.read(1))
self.bytes_read += 1
except:
raise IOError("Couldn't read variable length byte from file.")
if r & 0x80:
result = (result << 7) + (r & 0x7F)
else:
result = (result << 7) + r
bytes_read += 1
if not return_bytes_read:
return result
else:
return (result, bytes_read) | python | def parse_varbyte_as_int(self, fp, return_bytes_read=True):
"""Read a variable length byte from the file and return the
corresponding integer."""
result = 0
bytes_read = 0
r = 0x80
while r & 0x80:
try:
r = self.bytes_to_int(fp.read(1))
self.bytes_read += 1
except:
raise IOError("Couldn't read variable length byte from file.")
if r & 0x80:
result = (result << 7) + (r & 0x7F)
else:
result = (result << 7) + r
bytes_read += 1
if not return_bytes_read:
return result
else:
return (result, bytes_read) | [
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bspaans/python-mingus | mingus/containers/note.py | Note.set_note | def set_note(self, name='C', octave=4, dynamics={}):
"""Set the note to name in octave with dynamics.
Return the objects if it succeeded, raise an NoteFormatError
otherwise.
"""
dash_index = name.split('-')
if len(dash_index) == 1:
if notes.is_valid_note(name):
self.name = name
self.octave = octave
self.dynamics = dynamics
return self
else:
raise NoteFormatError("The string '%s' is not a valid "
"representation of a note in mingus" % name)
elif len(dash_index) == 2:
if notes.is_valid_note(dash_index[0]):
self.name = dash_index[0]
self.octave = int(dash_index[1])
self.dynamics = dynamics
return self
else:
raise NoteFormatError("The string '%s' is not a valid "
"representation of a note in mingus" % name)
return False | python | def set_note(self, name='C', octave=4, dynamics={}):
"""Set the note to name in octave with dynamics.
Return the objects if it succeeded, raise an NoteFormatError
otherwise.
"""
dash_index = name.split('-')
if len(dash_index) == 1:
if notes.is_valid_note(name):
self.name = name
self.octave = octave
self.dynamics = dynamics
return self
else:
raise NoteFormatError("The string '%s' is not a valid "
"representation of a note in mingus" % name)
elif len(dash_index) == 2:
if notes.is_valid_note(dash_index[0]):
self.name = dash_index[0]
self.octave = int(dash_index[1])
self.dynamics = dynamics
return self
else:
raise NoteFormatError("The string '%s' is not a valid "
"representation of a note in mingus" % name)
return False | [
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bspaans/python-mingus | mingus/containers/note.py | Note.change_octave | def change_octave(self, diff):
"""Change the octave of the note to the current octave + diff."""
self.octave += diff
if self.octave < 0:
self.octave = 0 | python | def change_octave(self, diff):
"""Change the octave of the note to the current octave + diff."""
self.octave += diff
if self.octave < 0:
self.octave = 0 | [
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bspaans/python-mingus | mingus/containers/note.py | Note.transpose | def transpose(self, interval, up=True):
"""Transpose the note up or down the interval.
Examples:
>>> a = Note('A')
>>> a.transpose('3')
>>> a
'C#-5'
>>> a.transpose('3', False)
>>> a
'A-4'
"""
(old, o_octave) = (self.name, self.octave)
self.name = intervals.from_shorthand(self.name, interval, up)
if up:
if self < Note(old, o_octave):
self.octave += 1
else:
if self > Note(old, o_octave):
self.octave -= 1 | python | def transpose(self, interval, up=True):
"""Transpose the note up or down the interval.
Examples:
>>> a = Note('A')
>>> a.transpose('3')
>>> a
'C#-5'
>>> a.transpose('3', False)
>>> a
'A-4'
"""
(old, o_octave) = (self.name, self.octave)
self.name = intervals.from_shorthand(self.name, interval, up)
if up:
if self < Note(old, o_octave):
self.octave += 1
else:
if self > Note(old, o_octave):
self.octave -= 1 | [
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bspaans/python-mingus | mingus/containers/note.py | Note.from_int | def from_int(self, integer):
"""Set the Note corresponding to the integer.
0 is a C on octave 0, 12 is a C on octave 1, etc.
Example:
>>> Note().from_int(12)
'C-1'
"""
self.name = notes.int_to_note(integer % 12)
self.octave = integer // 12
return self | python | def from_int(self, integer):
"""Set the Note corresponding to the integer.
0 is a C on octave 0, 12 is a C on octave 1, etc.
Example:
>>> Note().from_int(12)
'C-1'
"""
self.name = notes.int_to_note(integer % 12)
self.octave = integer // 12
return self | [
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bspaans/python-mingus | mingus/containers/note.py | Note.from_hertz | def from_hertz(self, hertz, standard_pitch=440):
"""Set the Note name and pitch, calculated from the hertz value.
The standard_pitch argument can be used to set the pitch of A-4,
from which the rest is calculated.
"""
value = ((log((float(hertz) * 1024) / standard_pitch, 2) +
1.0 / 24) * 12 + 9) # notes.note_to_int("A")
self.name = notes.int_to_note(int(value) % 12)
self.octave = int(value / 12) - 6
return self | python | def from_hertz(self, hertz, standard_pitch=440):
"""Set the Note name and pitch, calculated from the hertz value.
The standard_pitch argument can be used to set the pitch of A-4,
from which the rest is calculated.
"""
value = ((log((float(hertz) * 1024) / standard_pitch, 2) +
1.0 / 24) * 12 + 9) # notes.note_to_int("A")
self.name = notes.int_to_note(int(value) % 12)
self.octave = int(value / 12) - 6
return self | [
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bspaans/python-mingus | mingus/containers/note.py | Note.to_shorthand | def to_shorthand(self):
"""Give the traditional Helmhotz pitch notation.
Examples:
>>> Note('C-4').to_shorthand()
"c'"
>>> Note('C-3').to_shorthand()
'c'
>>> Note('C-2').to_shorthand()
'C'
>>> Note('C-1').to_shorthand()
'C,'
"""
if self.octave < 3:
res = self.name
else:
res = str.lower(self.name)
o = self.octave - 3
while o < -1:
res += ','
o += 1
while o > 0:
res += "'"
o -= 1
return res | python | def to_shorthand(self):
"""Give the traditional Helmhotz pitch notation.
Examples:
>>> Note('C-4').to_shorthand()
"c'"
>>> Note('C-3').to_shorthand()
'c'
>>> Note('C-2').to_shorthand()
'C'
>>> Note('C-1').to_shorthand()
'C,'
"""
if self.octave < 3:
res = self.name
else:
res = str.lower(self.name)
o = self.octave - 3
while o < -1:
res += ','
o += 1
while o > 0:
res += "'"
o -= 1
return res | [
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"c'"
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'c'
>>> Note('C-2').to_shorthand()
'C'
>>> Note('C-1').to_shorthand()
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bspaans/python-mingus | mingus/containers/note.py | Note.from_shorthand | def from_shorthand(self, shorthand):
"""Convert from traditional Helmhotz pitch notation.
Examples:
>>> Note().from_shorthand("C,,")
'C-0'
>>> Note().from_shorthand("C")
'C-2'
>>> Note().from_shorthand("c'")
'C-4'
"""
name = ''
octave = 0
for x in shorthand:
if x in ['a', 'b', 'c', 'd', 'e', 'f', 'g']:
name = str.upper(x)
octave = 3
elif x in ['A', 'B', 'C', 'D', 'E', 'F', 'G']:
name = x
octave = 2
elif x in ['#', 'b']:
name += x
elif x == ',':
octave -= 1
elif x == "'":
octave += 1
return self.set_note(name, octave, {}) | python | def from_shorthand(self, shorthand):
"""Convert from traditional Helmhotz pitch notation.
Examples:
>>> Note().from_shorthand("C,,")
'C-0'
>>> Note().from_shorthand("C")
'C-2'
>>> Note().from_shorthand("c'")
'C-4'
"""
name = ''
octave = 0
for x in shorthand:
if x in ['a', 'b', 'c', 'd', 'e', 'f', 'g']:
name = str.upper(x)
octave = 3
elif x in ['A', 'B', 'C', 'D', 'E', 'F', 'G']:
name = x
octave = 2
elif x in ['#', 'b']:
name += x
elif x == ',':
octave -= 1
elif x == "'":
octave += 1
return self.set_note(name, octave, {}) | [
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'C-2'
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'C-4' | [
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bspaans/python-mingus | mingus/core/intervals.py | interval | def interval(key, start_note, interval):
"""Return the note found at the interval starting from start_note in the
given key.
Raise a KeyError exception if start_note is not a valid note.
Example:
>>> interval('C', 'D', 1)
'E'
"""
if not notes.is_valid_note(start_note):
raise KeyError("The start note '%s' is not a valid note" % start_note)
notes_in_key = keys.get_notes(key)
for n in notes_in_key:
if n[0] == start_note[0]:
index = notes_in_key.index(n)
return notes_in_key[(index + interval) % 7] | python | def interval(key, start_note, interval):
"""Return the note found at the interval starting from start_note in the
given key.
Raise a KeyError exception if start_note is not a valid note.
Example:
>>> interval('C', 'D', 1)
'E'
"""
if not notes.is_valid_note(start_note):
raise KeyError("The start note '%s' is not a valid note" % start_note)
notes_in_key = keys.get_notes(key)
for n in notes_in_key:
if n[0] == start_note[0]:
index = notes_in_key.index(n)
return notes_in_key[(index + interval) % 7] | [
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'E' | [
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bspaans/python-mingus | mingus/core/intervals.py | measure | def measure(note1, note2):
"""Return an integer in the range of 0-11, determining the half note steps
between note1 and note2.
Examples:
>>> measure('C', 'D')
2
>>> measure('D', 'C')
10
"""
res = notes.note_to_int(note2) - notes.note_to_int(note1)
if res < 0:
return 12 - res * -1
else:
return res | python | def measure(note1, note2):
"""Return an integer in the range of 0-11, determining the half note steps
between note1 and note2.
Examples:
>>> measure('C', 'D')
2
>>> measure('D', 'C')
10
"""
res = notes.note_to_int(note2) - notes.note_to_int(note1)
if res < 0:
return 12 - res * -1
else:
return res | [
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bspaans/python-mingus | mingus/core/intervals.py | augment_or_diminish_until_the_interval_is_right | def augment_or_diminish_until_the_interval_is_right(note1, note2, interval):
"""A helper function for the minor and major functions.
You should probably not use this directly.
"""
cur = measure(note1, note2)
while cur != interval:
if cur > interval:
note2 = notes.diminish(note2)
elif cur < interval:
note2 = notes.augment(note2)
cur = measure(note1, note2)
# We are practically done right now, but we need to be able to create the
# minor seventh of Cb and get Bbb instead of B######### as the result
val = 0
for token in note2[1:]:
if token == '#':
val += 1
elif token == 'b':
val -= 1
# These are some checks to see if we have generated too much #'s or too much
# b's. In these cases we need to convert #'s to b's and vice versa.
if val > 6:
val = val % 12
val = -12 + val
elif val < -6:
val = val % -12
val = 12 + val
# Rebuild the note
result = note2[0]
while val > 0:
result = notes.augment(result)
val -= 1
while val < 0:
result = notes.diminish(result)
val += 1
return result | python | def augment_or_diminish_until_the_interval_is_right(note1, note2, interval):
"""A helper function for the minor and major functions.
You should probably not use this directly.
"""
cur = measure(note1, note2)
while cur != interval:
if cur > interval:
note2 = notes.diminish(note2)
elif cur < interval:
note2 = notes.augment(note2)
cur = measure(note1, note2)
# We are practically done right now, but we need to be able to create the
# minor seventh of Cb and get Bbb instead of B######### as the result
val = 0
for token in note2[1:]:
if token == '#':
val += 1
elif token == 'b':
val -= 1
# These are some checks to see if we have generated too much #'s or too much
# b's. In these cases we need to convert #'s to b's and vice versa.
if val > 6:
val = val % 12
val = -12 + val
elif val < -6:
val = val % -12
val = 12 + val
# Rebuild the note
result = note2[0]
while val > 0:
result = notes.augment(result)
val -= 1
while val < 0:
result = notes.diminish(result)
val += 1
return result | [
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bspaans/python-mingus | mingus/core/intervals.py | invert | def invert(interval):
"""Invert an interval.
Example:
>>> invert(['C', 'E'])
['E', 'C']
"""
interval.reverse()
res = list(interval)
interval.reverse()
return res | python | def invert(interval):
"""Invert an interval.
Example:
>>> invert(['C', 'E'])
['E', 'C']
"""
interval.reverse()
res = list(interval)
interval.reverse()
return res | [
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bspaans/python-mingus | mingus/core/intervals.py | determine | def determine(note1, note2, shorthand=False):
"""Name the interval between note1 and note2.
Examples:
>>> determine('C', 'E')
'major third'
>>> determine('C', 'Eb')
'minor third'
>>> determine('C', 'E#')
'augmented third'
>>> determine('C', 'Ebb')
'diminished third'
This works for all intervals. Note that there are corner cases for major
fifths and fourths:
>>> determine('C', 'G')
'perfect fifth'
>>> determine('C', 'F')
'perfect fourth'
"""
# Corner case for unisons ('A' and 'Ab', for instance)
if note1[0] == note2[0]:
def get_val(note):
"""Private function: count the value of accidentals."""
r = 0
for x in note[1:]:
if x == 'b':
r -= 1
elif x == '#':
r += 1
return r
x = get_val(note1)
y = get_val(note2)
if x == y:
if not shorthand:
return 'major unison'
return '1'
elif x < y:
if not shorthand:
return 'augmented unison'
return '#1'
elif x - y == 1:
if not shorthand:
return 'minor unison'
return 'b1'
else:
if not shorthand:
return 'diminished unison'
return 'bb1'
# Other intervals
n1 = notes.fifths.index(note1[0])
n2 = notes.fifths.index(note2[0])
number_of_fifth_steps = n2 - n1
if n2 < n1:
number_of_fifth_steps = len(notes.fifths) - n1 + n2
# [name, shorthand_name, half notes for major version of this interval]
fifth_steps = [
['unison', '1', 0],
['fifth', '5', 7],
['second', '2', 2],
['sixth', '6', 9],
['third', '3', 4],
['seventh', '7', 11],
['fourth', '4', 5],
]
# Count half steps between note1 and note2
half_notes = measure(note1, note2)
# Get the proper list from the number of fifth steps
current = fifth_steps[number_of_fifth_steps]
# maj = number of major steps for this interval
maj = current[2]
# if maj is equal to the half steps between note1 and note2 the interval is
# major or perfect
if maj == half_notes:
# Corner cases for perfect fifths and fourths
if current[0] == 'fifth':
if not shorthand:
return 'perfect fifth'
elif current[0] == 'fourth':
if not shorthand:
return 'perfect fourth'
if not shorthand:
return 'major ' + current[0]
return current[1]
elif maj + 1 <= half_notes:
# if maj + 1 is equal to half_notes, the interval is augmented.
if not shorthand:
return 'augmented ' + current[0]
return '#' * (half_notes - maj) + current[1]
elif maj - 1 == half_notes:
# etc.
if not shorthand:
return 'minor ' + current[0]
return 'b' + current[1]
elif maj - 2 >= half_notes:
if not shorthand:
return 'diminished ' + current[0]
return 'b' * (maj - half_notes) + current[1] | python | def determine(note1, note2, shorthand=False):
"""Name the interval between note1 and note2.
Examples:
>>> determine('C', 'E')
'major third'
>>> determine('C', 'Eb')
'minor third'
>>> determine('C', 'E#')
'augmented third'
>>> determine('C', 'Ebb')
'diminished third'
This works for all intervals. Note that there are corner cases for major
fifths and fourths:
>>> determine('C', 'G')
'perfect fifth'
>>> determine('C', 'F')
'perfect fourth'
"""
# Corner case for unisons ('A' and 'Ab', for instance)
if note1[0] == note2[0]:
def get_val(note):
"""Private function: count the value of accidentals."""
r = 0
for x in note[1:]:
if x == 'b':
r -= 1
elif x == '#':
r += 1
return r
x = get_val(note1)
y = get_val(note2)
if x == y:
if not shorthand:
return 'major unison'
return '1'
elif x < y:
if not shorthand:
return 'augmented unison'
return '#1'
elif x - y == 1:
if not shorthand:
return 'minor unison'
return 'b1'
else:
if not shorthand:
return 'diminished unison'
return 'bb1'
# Other intervals
n1 = notes.fifths.index(note1[0])
n2 = notes.fifths.index(note2[0])
number_of_fifth_steps = n2 - n1
if n2 < n1:
number_of_fifth_steps = len(notes.fifths) - n1 + n2
# [name, shorthand_name, half notes for major version of this interval]
fifth_steps = [
['unison', '1', 0],
['fifth', '5', 7],
['second', '2', 2],
['sixth', '6', 9],
['third', '3', 4],
['seventh', '7', 11],
['fourth', '4', 5],
]
# Count half steps between note1 and note2
half_notes = measure(note1, note2)
# Get the proper list from the number of fifth steps
current = fifth_steps[number_of_fifth_steps]
# maj = number of major steps for this interval
maj = current[2]
# if maj is equal to the half steps between note1 and note2 the interval is
# major or perfect
if maj == half_notes:
# Corner cases for perfect fifths and fourths
if current[0] == 'fifth':
if not shorthand:
return 'perfect fifth'
elif current[0] == 'fourth':
if not shorthand:
return 'perfect fourth'
if not shorthand:
return 'major ' + current[0]
return current[1]
elif maj + 1 <= half_notes:
# if maj + 1 is equal to half_notes, the interval is augmented.
if not shorthand:
return 'augmented ' + current[0]
return '#' * (half_notes - maj) + current[1]
elif maj - 1 == half_notes:
# etc.
if not shorthand:
return 'minor ' + current[0]
return 'b' + current[1]
elif maj - 2 >= half_notes:
if not shorthand:
return 'diminished ' + current[0]
return 'b' * (maj - half_notes) + current[1] | [
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Examples:
>>> determine('C', 'E')
'major third'
>>> determine('C', 'Eb')
'minor third'
>>> determine('C', 'E#')
'augmented third'
>>> determine('C', 'Ebb')
'diminished third'
This works for all intervals. Note that there are corner cases for major
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>>> determine('C', 'G')
'perfect fifth'
>>> determine('C', 'F')
'perfect fourth' | [
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bspaans/python-mingus | mingus/core/intervals.py | from_shorthand | def from_shorthand(note, interval, up=True):
"""Return the note on interval up or down.
Examples:
>>> from_shorthand('A', 'b3')
'C'
>>> from_shorthand('D', '2')
'E'
>>> from_shorthand('E', '2', False)
'D'
"""
# warning should be a valid note.
if not notes.is_valid_note(note):
return False
# [shorthand, interval function up, interval function down]
shorthand_lookup = [
['1', major_unison, major_unison],
['2', major_second, minor_seventh],
['3', major_third, minor_sixth],
['4', major_fourth, major_fifth],
['5', major_fifth, major_fourth],
['6', major_sixth, minor_third],
['7', major_seventh, minor_second],
]
# Looking up last character in interval in shorthand_lookup and calling that
# function.
val = False
for shorthand in shorthand_lookup:
if shorthand[0] == interval[-1]:
if up:
val = shorthand[1](note)
else:
val = shorthand[2](note)
# warning Last character in interval should be 1-7
if val == False:
return False
# Collect accidentals
for x in interval:
if x == '#':
if up:
val = notes.augment(val)
else:
val = notes.diminish(val)
elif x == 'b':
if up:
val = notes.diminish(val)
else:
val = notes.augment(val)
else:
return val | python | def from_shorthand(note, interval, up=True):
"""Return the note on interval up or down.
Examples:
>>> from_shorthand('A', 'b3')
'C'
>>> from_shorthand('D', '2')
'E'
>>> from_shorthand('E', '2', False)
'D'
"""
# warning should be a valid note.
if not notes.is_valid_note(note):
return False
# [shorthand, interval function up, interval function down]
shorthand_lookup = [
['1', major_unison, major_unison],
['2', major_second, minor_seventh],
['3', major_third, minor_sixth],
['4', major_fourth, major_fifth],
['5', major_fifth, major_fourth],
['6', major_sixth, minor_third],
['7', major_seventh, minor_second],
]
# Looking up last character in interval in shorthand_lookup and calling that
# function.
val = False
for shorthand in shorthand_lookup:
if shorthand[0] == interval[-1]:
if up:
val = shorthand[1](note)
else:
val = shorthand[2](note)
# warning Last character in interval should be 1-7
if val == False:
return False
# Collect accidentals
for x in interval:
if x == '#':
if up:
val = notes.augment(val)
else:
val = notes.diminish(val)
elif x == 'b':
if up:
val = notes.diminish(val)
else:
val = notes.augment(val)
else:
return val | [
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>>> from_shorthand('E', '2', False)
'D' | [
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bspaans/python-mingus | mingus/core/intervals.py | is_consonant | def is_consonant(note1, note2, include_fourths=True):
"""Return True if the interval is consonant.
A consonance is a harmony, chord, or interval considered stable, as
opposed to a dissonance.
This function tests whether the given interval is consonant. This
basically means that it checks whether the interval is (or sounds like)
a unison, third, sixth, perfect fourth or perfect fifth.
In classical music the fourth is considered dissonant when used
contrapuntal, which is why you can choose to exclude it.
"""
return (is_perfect_consonant(note1, note2, include_fourths) or
is_imperfect_consonant(note1, note2)) | python | def is_consonant(note1, note2, include_fourths=True):
"""Return True if the interval is consonant.
A consonance is a harmony, chord, or interval considered stable, as
opposed to a dissonance.
This function tests whether the given interval is consonant. This
basically means that it checks whether the interval is (or sounds like)
a unison, third, sixth, perfect fourth or perfect fifth.
In classical music the fourth is considered dissonant when used
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"""
return (is_perfect_consonant(note1, note2, include_fourths) or
is_imperfect_consonant(note1, note2)) | [
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bspaans/python-mingus | mingus/core/intervals.py | is_perfect_consonant | def is_perfect_consonant(note1, note2, include_fourths=True):
"""Return True if the interval is a perfect consonant one.
Perfect consonances are either unisons, perfect fourths or fifths, or
octaves (which is the same as a unison in this model).
Perfect fourths are usually included as well, but are considered
dissonant when used contrapuntal, which is why you can exclude them.
"""
dhalf = measure(note1, note2)
return dhalf in [0, 7] or include_fourths and dhalf == 5 | python | def is_perfect_consonant(note1, note2, include_fourths=True):
"""Return True if the interval is a perfect consonant one.
Perfect consonances are either unisons, perfect fourths or fifths, or
octaves (which is the same as a unison in this model).
Perfect fourths are usually included as well, but are considered
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"""
dhalf = measure(note1, note2)
return dhalf in [0, 7] or include_fourths and dhalf == 5 | [
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bspaans/python-mingus | mingus/containers/composition.py | Composition.add_track | def add_track(self, track):
"""Add a track to the composition.
Raise an UnexpectedObjectError if the argument is not a
mingus.containers.Track object.
"""
if not hasattr(track, 'bars'):
raise UnexpectedObjectError("Unexpected object '%s', "
"expecting a mingus.containers.Track object" % track)
self.tracks.append(track)
self.selected_tracks = [len(self.tracks) - 1] | python | def add_track(self, track):
"""Add a track to the composition.
Raise an UnexpectedObjectError if the argument is not a
mingus.containers.Track object.
"""
if not hasattr(track, 'bars'):
raise UnexpectedObjectError("Unexpected object '%s', "
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self.tracks.append(track)
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bspaans/python-mingus | mingus/containers/composition.py | Composition.add_note | def add_note(self, note):
"""Add a note to the selected tracks.
Everything container.Track supports in __add__ is accepted.
"""
for n in self.selected_tracks:
self.tracks[n] + note | python | def add_note(self, note):
"""Add a note to the selected tracks.
Everything container.Track supports in __add__ is accepted.
"""
for n in self.selected_tracks:
self.tracks[n] + note | [
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bspaans/python-mingus | mingus/midi/pyfluidsynth.py | cfunc | def cfunc(name, result, *args):
"""Build and apply a ctypes prototype complete with parameter flags."""
atypes = []
aflags = []
for arg in args:
atypes.append(arg[1])
aflags.append((arg[2], arg[0]) + arg[3:])
return CFUNCTYPE(result, *atypes)((name, _fl), tuple(aflags)) | python | def cfunc(name, result, *args):
"""Build and apply a ctypes prototype complete with parameter flags."""
atypes = []
aflags = []
for arg in args:
atypes.append(arg[1])
aflags.append((arg[2], arg[0]) + arg[3:])
return CFUNCTYPE(result, *atypes)((name, _fl), tuple(aflags)) | [
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bspaans/python-mingus | mingus/midi/pyfluidsynth.py | fluid_synth_write_s16_stereo | def fluid_synth_write_s16_stereo(synth, len):
"""Return generated samples in stereo 16-bit format.
Return value is a Numpy array of samples.
"""
import numpy
buf = create_string_buffer(len * 4)
fluid_synth_write_s16(synth, len, buf, 0, 2, buf, 1, 2)
return numpy.fromstring(buf[:], dtype=numpy.int16) | python | def fluid_synth_write_s16_stereo(synth, len):
"""Return generated samples in stereo 16-bit format.
Return value is a Numpy array of samples.
"""
import numpy
buf = create_string_buffer(len * 4)
fluid_synth_write_s16(synth, len, buf, 0, 2, buf, 1, 2)
return numpy.fromstring(buf[:], dtype=numpy.int16) | [
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bspaans/python-mingus | mingus/midi/pyfluidsynth.py | Synth.start | def start(self, driver=None):
"""Start audio output driver in separate background thread.
Call this function any time after creating the Synth object.
If you don't call this function, use get_samples() to generate
samples.
Optional keyword argument:
driver: which audio driver to use for output
Possible choices:
'alsa', 'oss', 'jack', 'portaudio'
'sndmgr', 'coreaudio', 'Direct Sound',
'dsound', 'pulseaudio'
Not all drivers will be available for every platform, it depends on
which drivers were compiled into FluidSynth for your platform.
"""
if driver is not None:
assert driver in [
'alsa',
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'sndmgr',
'coreaudio',
'Direct Sound',
'dsound',
'pulseaudio'
]
fluid_settings_setstr(self.settings, 'audio.driver', driver)
self.audio_driver = new_fluid_audio_driver(self.settings, self.synth) | python | def start(self, driver=None):
"""Start audio output driver in separate background thread.
Call this function any time after creating the Synth object.
If you don't call this function, use get_samples() to generate
samples.
Optional keyword argument:
driver: which audio driver to use for output
Possible choices:
'alsa', 'oss', 'jack', 'portaudio'
'sndmgr', 'coreaudio', 'Direct Sound',
'dsound', 'pulseaudio'
Not all drivers will be available for every platform, it depends on
which drivers were compiled into FluidSynth for your platform.
"""
if driver is not None:
assert driver in [
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'oss',
'jack',
'portaudio',
'sndmgr',
'coreaudio',
'Direct Sound',
'dsound',
'pulseaudio'
]
fluid_settings_setstr(self.settings, 'audio.driver', driver)
self.audio_driver = new_fluid_audio_driver(self.settings, self.synth) | [
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bspaans/python-mingus | mingus/midi/pyfluidsynth.py | Synth.program_select | def program_select(self, chan, sfid, bank, preset):
"""Select a program."""
return fluid_synth_program_select(self.synth, chan, sfid, bank, preset) | python | def program_select(self, chan, sfid, bank, preset):
"""Select a program."""
return fluid_synth_program_select(self.synth, chan, sfid, bank, preset) | [
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bspaans/python-mingus | mingus/midi/pyfluidsynth.py | Synth.noteon | def noteon(self, chan, key, vel):
"""Play a note."""
if key < 0 or key > 128:
return False
if chan < 0:
return False
if vel < 0 or vel > 128:
return False
return fluid_synth_noteon(self.synth, chan, key, vel) | python | def noteon(self, chan, key, vel):
"""Play a note."""
if key < 0 or key > 128:
return False
if chan < 0:
return False
if vel < 0 or vel > 128:
return False
return fluid_synth_noteon(self.synth, chan, key, vel) | [
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bspaans/python-mingus | mingus/midi/pyfluidsynth.py | Synth.noteoff | def noteoff(self, chan, key):
"""Stop a note."""
if key < 0 or key > 128:
return False
if chan < 0:
return False
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"""Stop a note."""
if key < 0 or key > 128:
return False
if chan < 0:
return False
return fluid_synth_noteoff(self.synth, chan, key) | [
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bspaans/python-mingus | mingus/midi/pyfluidsynth.py | Synth.cc | def cc(self, chan, ctrl, val):
"""Send control change value.
The controls that are recognized are dependent on the
SoundFont. Values are always 0 to 127. Typical controls
include:
1: vibrato
7: volume
10: pan (left to right)
11: expression (soft to loud)
64: sustain
91: reverb
93: chorus
"""
return fluid_synth_cc(self.synth, chan, ctrl, val) | python | def cc(self, chan, ctrl, val):
"""Send control change value.
The controls that are recognized are dependent on the
SoundFont. Values are always 0 to 127. Typical controls
include:
1: vibrato
7: volume
10: pan (left to right)
11: expression (soft to loud)
64: sustain
91: reverb
93: chorus
"""
return fluid_synth_cc(self.synth, chan, ctrl, val) | [
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bspaans/python-mingus | mingus/core/notes.py | is_valid_note | def is_valid_note(note):
"""Return True if note is in a recognised format. False if not."""
if not _note_dict.has_key(note[0]):
return False
for post in note[1:]:
if post != 'b' and post != '#':
return False
return True | python | def is_valid_note(note):
"""Return True if note is in a recognised format. False if not."""
if not _note_dict.has_key(note[0]):
return False
for post in note[1:]:
if post != 'b' and post != '#':
return False
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bspaans/python-mingus | mingus/core/notes.py | reduce_accidentals | def reduce_accidentals(note):
"""Reduce any extra accidentals to proper notes.
Example:
>>> reduce_accidentals('C####')
'E'
"""
val = note_to_int(note[0])
for token in note[1:]:
if token == 'b':
val -= 1
elif token == '#':
val += 1
else:
raise NoteFormatError("Unknown note format '%s'" % note)
if val >= note_to_int(note[0]):
return int_to_note(val%12)
else:
return int_to_note(val%12, 'b') | python | def reduce_accidentals(note):
"""Reduce any extra accidentals to proper notes.
Example:
>>> reduce_accidentals('C####')
'E'
"""
val = note_to_int(note[0])
for token in note[1:]:
if token == 'b':
val -= 1
elif token == '#':
val += 1
else:
raise NoteFormatError("Unknown note format '%s'" % note)
if val >= note_to_int(note[0]):
return int_to_note(val%12)
else:
return int_to_note(val%12, 'b') | [
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bspaans/python-mingus | mingus/core/notes.py | remove_redundant_accidentals | def remove_redundant_accidentals(note):
"""Remove redundant sharps and flats from the given note.
Examples:
>>> remove_redundant_accidentals('C##b')
'C#'
>>> remove_redundant_accidentals('Eb##b')
'E'
"""
val = 0
for token in note[1:]:
if token == 'b':
val -= 1
elif token == '#':
val += 1
result = note[0]
while val > 0:
result = augment(result)
val -= 1
while val < 0:
result = diminish(result)
val += 1
return result | python | def remove_redundant_accidentals(note):
"""Remove redundant sharps and flats from the given note.
Examples:
>>> remove_redundant_accidentals('C##b')
'C#'
>>> remove_redundant_accidentals('Eb##b')
'E'
"""
val = 0
for token in note[1:]:
if token == 'b':
val -= 1
elif token == '#':
val += 1
result = note[0]
while val > 0:
result = augment(result)
val -= 1
while val < 0:
result = diminish(result)
val += 1
return result | [
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'E' | [
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bspaans/python-mingus | mingus/extra/musicxml.py | _gcd | def _gcd(a=None, b=None, terms=None):
"""Return greatest common divisor using Euclid's Algorithm."""
if terms:
return reduce(lambda a, b: _gcd(a, b), terms)
else:
while b:
(a, b) = (b, a % b)
return a | python | def _gcd(a=None, b=None, terms=None):
"""Return greatest common divisor using Euclid's Algorithm."""
if terms:
return reduce(lambda a, b: _gcd(a, b), terms)
else:
while b:
(a, b) = (b, a % b)
return a | [
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bspaans/python-mingus | mingus/core/keys.py | get_key_signature | def get_key_signature(key='C'):
"""Return the key signature.
0 for C or a, negative numbers for flat key signatures, positive numbers
for sharp key signatures.
"""
if not is_valid_key(key):
raise NoteFormatError("unrecognized format for key '%s'" % key)
for couple in keys:
if key in couple:
accidentals = keys.index(couple) - 7
return accidentals | python | def get_key_signature(key='C'):
"""Return the key signature.
0 for C or a, negative numbers for flat key signatures, positive numbers
for sharp key signatures.
"""
if not is_valid_key(key):
raise NoteFormatError("unrecognized format for key '%s'" % key)
for couple in keys:
if key in couple:
accidentals = keys.index(couple) - 7
return accidentals | [
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bspaans/python-mingus | mingus/core/keys.py | get_key_signature_accidentals | def get_key_signature_accidentals(key='C'):
"""Return the list of accidentals present into the key signature."""
accidentals = get_key_signature(key)
res = []
if accidentals < 0:
for i in range(-accidentals):
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elif accidentals > 0:
for i in range(accidentals):
res.append('{0}{1}'.format(notes.fifths[i], '#'))
return res | python | def get_key_signature_accidentals(key='C'):
"""Return the list of accidentals present into the key signature."""
accidentals = get_key_signature(key)
res = []
if accidentals < 0:
for i in range(-accidentals):
res.append('{0}{1}'.format(list(reversed(notes.fifths))[i], 'b'))
elif accidentals > 0:
for i in range(accidentals):
res.append('{0}{1}'.format(notes.fifths[i], '#'))
return res | [
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bspaans/python-mingus | mingus/core/keys.py | get_notes | def get_notes(key='C'):
"""Return an ordered list of the notes in this natural key.
Examples:
>>> get_notes('F')
['F', 'G', 'A', 'Bb', 'C', 'D', 'E']
>>> get_notes('c')
['C', 'D', 'Eb', 'F', 'G', 'Ab', 'Bb']
"""
if _key_cache.has_key(key):
return _key_cache[key]
if not is_valid_key(key):
raise NoteFormatError("unrecognized format for key '%s'" % key)
result = []
# Calculate notes
altered_notes = map(operator.itemgetter(0),
get_key_signature_accidentals(key))
if get_key_signature(key) < 0:
symbol = 'b'
elif get_key_signature(key) > 0:
symbol = '#'
raw_tonic_index = base_scale.index(key.upper()[0])
for note in islice(cycle(base_scale), raw_tonic_index, raw_tonic_index+7):
if note in altered_notes:
result.append('%s%s' % (note, symbol))
else:
result.append(note)
# Save result to cache
_key_cache[key] = result
return result | python | def get_notes(key='C'):
"""Return an ordered list of the notes in this natural key.
Examples:
>>> get_notes('F')
['F', 'G', 'A', 'Bb', 'C', 'D', 'E']
>>> get_notes('c')
['C', 'D', 'Eb', 'F', 'G', 'Ab', 'Bb']
"""
if _key_cache.has_key(key):
return _key_cache[key]
if not is_valid_key(key):
raise NoteFormatError("unrecognized format for key '%s'" % key)
result = []
# Calculate notes
altered_notes = map(operator.itemgetter(0),
get_key_signature_accidentals(key))
if get_key_signature(key) < 0:
symbol = 'b'
elif get_key_signature(key) > 0:
symbol = '#'
raw_tonic_index = base_scale.index(key.upper()[0])
for note in islice(cycle(base_scale), raw_tonic_index, raw_tonic_index+7):
if note in altered_notes:
result.append('%s%s' % (note, symbol))
else:
result.append(note)
# Save result to cache
_key_cache[key] = result
return result | [
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.attach | def attach(self, listener):
"""Attach an object that should be notified of events.
The object should have a notify(msg_type, param_dict) function.
"""
if listener not in self.listeners:
self.listeners.append(listener) | python | def attach(self, listener):
"""Attach an object that should be notified of events.
The object should have a notify(msg_type, param_dict) function.
"""
if listener not in self.listeners:
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.detach | def detach(self, listener):
"""Detach a listening object so that it won't receive any events
anymore."""
if listener in self.listeners:
self.listeners.remove(listener) | python | def detach(self, listener):
"""Detach a listening object so that it won't receive any events
anymore."""
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.notify_listeners | def notify_listeners(self, msg_type, params):
"""Send a message to all the observers."""
for c in self.listeners:
c.notify(msg_type, params) | python | def notify_listeners(self, msg_type, params):
"""Send a message to all the observers."""
for c in self.listeners:
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.set_instrument | def set_instrument(self, channel, instr, bank=0):
"""Set the channel to the instrument _instr_."""
self.instr_event(channel, instr, bank)
self.notify_listeners(self.MSG_INSTR, {'channel': int(channel),
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"""Set the channel to the instrument _instr_."""
self.instr_event(channel, instr, bank)
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.control_change | def control_change(self, channel, control, value):
"""Send a control change message.
See the MIDI specification for more information.
"""
if control < 0 or control > 128:
return False
if value < 0 or value > 128:
return False
self.cc_event(channel, control, value)
self.notify_listeners(self.MSG_CC, {'channel': int(channel),
'control': int(control), 'value': int(value)})
return True | python | def control_change(self, channel, control, value):
"""Send a control change message.
See the MIDI specification for more information.
"""
if control < 0 or control > 128:
return False
if value < 0 or value > 128:
return False
self.cc_event(channel, control, value)
self.notify_listeners(self.MSG_CC, {'channel': int(channel),
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.stop_Note | def stop_Note(self, note, channel=1):
"""Stop a note on a channel.
If Note.channel is set, it will take presedence over the channel
argument given here.
"""
if hasattr(note, 'channel'):
channel = note.channel
self.stop_event(int(note) + 12, int(channel))
self.notify_listeners(self.MSG_STOP_INT, {'channel': int(channel),
'note': int(note) + 12})
self.notify_listeners(self.MSG_STOP_NOTE, {'channel': int(channel),
'note': note})
return True | python | def stop_Note(self, note, channel=1):
"""Stop a note on a channel.
If Note.channel is set, it will take presedence over the channel
argument given here.
"""
if hasattr(note, 'channel'):
channel = note.channel
self.stop_event(int(note) + 12, int(channel))
self.notify_listeners(self.MSG_STOP_INT, {'channel': int(channel),
'note': int(note) + 12})
self.notify_listeners(self.MSG_STOP_NOTE, {'channel': int(channel),
'note': note})
return True | [
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.stop_everything | def stop_everything(self):
"""Stop all the notes on all channels."""
for x in range(118):
for c in range(16):
self.stop_Note(x, c) | python | def stop_everything(self):
"""Stop all the notes on all channels."""
for x in range(118):
for c in range(16):
self.stop_Note(x, c) | [
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.play_NoteContainer | def play_NoteContainer(self, nc, channel=1, velocity=100):
"""Play the Notes in the NoteContainer nc."""
self.notify_listeners(self.MSG_PLAY_NC, {'notes': nc,
'channel': channel, 'velocity': velocity})
if nc is None:
return True
for note in nc:
if not self.play_Note(note, channel, velocity):
return False
return True | python | def play_NoteContainer(self, nc, channel=1, velocity=100):
"""Play the Notes in the NoteContainer nc."""
self.notify_listeners(self.MSG_PLAY_NC, {'notes': nc,
'channel': channel, 'velocity': velocity})
if nc is None:
return True
for note in nc:
if not self.play_Note(note, channel, velocity):
return False
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.stop_NoteContainer | def stop_NoteContainer(self, nc, channel=1):
"""Stop playing the notes in NoteContainer nc."""
self.notify_listeners(self.MSG_PLAY_NC, {'notes': nc,
'channel': channel})
if nc is None:
return True
for note in nc:
if not self.stop_Note(note, channel):
return False
return True | python | def stop_NoteContainer(self, nc, channel=1):
"""Stop playing the notes in NoteContainer nc."""
self.notify_listeners(self.MSG_PLAY_NC, {'notes': nc,
'channel': channel})
if nc is None:
return True
for note in nc:
if not self.stop_Note(note, channel):
return False
return True | [
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.play_Bar | def play_Bar(self, bar, channel=1, bpm=120):
"""Play a Bar object.
Return a dictionary with the bpm lemma set on success, an empty dict
on some kind of failure.
The tempo can be changed by setting the bpm attribute on a
NoteContainer.
"""
self.notify_listeners(self.MSG_PLAY_BAR, {'bar': bar, 'channel'
: channel, 'bpm': bpm})
# length of a quarter note
qn_length = 60.0 / bpm
for nc in bar:
if not self.play_NoteContainer(nc[2], channel, 100):
return {}
# Change the quarter note length if the NoteContainer has a bpm
# attribute
if hasattr(nc[2], 'bpm'):
bpm = nc[2].bpm
qn_length = 60.0 / bpm
ms = qn_length * (4.0 / nc[1])
self.sleep(ms)
self.notify_listeners(self.MSG_SLEEP, {'s': ms})
self.stop_NoteContainer(nc[2], channel)
return {'bpm': bpm} | python | def play_Bar(self, bar, channel=1, bpm=120):
"""Play a Bar object.
Return a dictionary with the bpm lemma set on success, an empty dict
on some kind of failure.
The tempo can be changed by setting the bpm attribute on a
NoteContainer.
"""
self.notify_listeners(self.MSG_PLAY_BAR, {'bar': bar, 'channel'
: channel, 'bpm': bpm})
# length of a quarter note
qn_length = 60.0 / bpm
for nc in bar:
if not self.play_NoteContainer(nc[2], channel, 100):
return {}
# Change the quarter note length if the NoteContainer has a bpm
# attribute
if hasattr(nc[2], 'bpm'):
bpm = nc[2].bpm
qn_length = 60.0 / bpm
ms = qn_length * (4.0 / nc[1])
self.sleep(ms)
self.notify_listeners(self.MSG_SLEEP, {'s': ms})
self.stop_NoteContainer(nc[2], channel)
return {'bpm': bpm} | [
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.play_Track | def play_Track(self, track, channel=1, bpm=120):
"""Play a Track object."""
self.notify_listeners(self.MSG_PLAY_TRACK, {'track': track, 'channel'
: channel, 'bpm': bpm})
for bar in track:
res = self.play_Bar(bar, channel, bpm)
if res != {}:
bpm = res['bpm']
else:
return {}
return {'bpm': bpm} | python | def play_Track(self, track, channel=1, bpm=120):
"""Play a Track object."""
self.notify_listeners(self.MSG_PLAY_TRACK, {'track': track, 'channel'
: channel, 'bpm': bpm})
for bar in track:
res = self.play_Bar(bar, channel, bpm)
if res != {}:
bpm = res['bpm']
else:
return {}
return {'bpm': bpm} | [
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.play_Tracks | def play_Tracks(self, tracks, channels, bpm=120):
"""Play a list of Tracks.
If an instance of MidiInstrument is used then the instrument will be
set automatically.
"""
self.notify_listeners(self.MSG_PLAY_TRACKS, {'tracks': tracks,
'channels': channels, 'bpm': bpm})
# Set the right instruments
for x in range(len(tracks)):
instr = tracks[x].instrument
if isinstance(instr, MidiInstrument):
try:
i = instr.names.index(instr.name)
except:
i = 1
self.set_instrument(channels[x], i)
else:
self.set_instrument(channels[x], 1)
current_bar = 0
max_bar = len(tracks[0])
# Play the bars
while current_bar < max_bar:
playbars = []
for tr in tracks:
playbars.append(tr[current_bar])
res = self.play_Bars(playbars, channels, bpm)
if res != {}:
bpm = res['bpm']
else:
return {}
current_bar += 1
return {'bpm': bpm} | python | def play_Tracks(self, tracks, channels, bpm=120):
"""Play a list of Tracks.
If an instance of MidiInstrument is used then the instrument will be
set automatically.
"""
self.notify_listeners(self.MSG_PLAY_TRACKS, {'tracks': tracks,
'channels': channels, 'bpm': bpm})
# Set the right instruments
for x in range(len(tracks)):
instr = tracks[x].instrument
if isinstance(instr, MidiInstrument):
try:
i = instr.names.index(instr.name)
except:
i = 1
self.set_instrument(channels[x], i)
else:
self.set_instrument(channels[x], 1)
current_bar = 0
max_bar = len(tracks[0])
# Play the bars
while current_bar < max_bar:
playbars = []
for tr in tracks:
playbars.append(tr[current_bar])
res = self.play_Bars(playbars, channels, bpm)
if res != {}:
bpm = res['bpm']
else:
return {}
current_bar += 1
return {'bpm': bpm} | [
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bspaans/python-mingus | mingus/midi/sequencer.py | Sequencer.play_Composition | def play_Composition(self, composition, channels=None, bpm=120):
"""Play a Composition object."""
self.notify_listeners(self.MSG_PLAY_COMPOSITION, {'composition'
: composition, 'channels': channels, 'bpm': bpm})
if channels == None:
channels = map(lambda x: x + 1, range(len(composition.tracks)))
return self.play_Tracks(composition.tracks, channels, bpm) | python | def play_Composition(self, composition, channels=None, bpm=120):
"""Play a Composition object."""
self.notify_listeners(self.MSG_PLAY_COMPOSITION, {'composition'
: composition, 'channels': channels, 'bpm': bpm})
if channels == None:
channels = map(lambda x: x + 1, range(len(composition.tracks)))
return self.play_Tracks(composition.tracks, channels, bpm) | [
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bspaans/python-mingus | mingus/extra/fft.py | _find_log_index | def _find_log_index(f):
"""Look up the index of the frequency f in the frequency table.
Return the nearest index.
"""
global _last_asked, _log_cache
(begin, end) = (0, 128)
# Most calls are sequential, this keeps track of the last value asked for so
# that we need to search much, much less.
if _last_asked is not None:
(lastn, lastval) = _last_asked
if f >= lastval:
if f <= _log_cache[lastn]:
_last_asked = (lastn, f)
return lastn
elif f <= _log_cache[lastn + 1]:
_last_asked = (lastn + 1, f)
return lastn + 1
begin = lastn
# Do some range checking
if f > _log_cache[127] or f <= 0:
return 128
# Binary search related algorithm to find the index
while begin != end:
n = (begin + end) // 2
c = _log_cache[n]
cp = _log_cache[n - 1] if n != 0 else 0
if cp < f <= c:
_last_asked = (n, f)
return n
if f < c:
end = n
else:
begin = n
_last_asked = (begin, f)
return begin | python | def _find_log_index(f):
"""Look up the index of the frequency f in the frequency table.
Return the nearest index.
"""
global _last_asked, _log_cache
(begin, end) = (0, 128)
# Most calls are sequential, this keeps track of the last value asked for so
# that we need to search much, much less.
if _last_asked is not None:
(lastn, lastval) = _last_asked
if f >= lastval:
if f <= _log_cache[lastn]:
_last_asked = (lastn, f)
return lastn
elif f <= _log_cache[lastn + 1]:
_last_asked = (lastn + 1, f)
return lastn + 1
begin = lastn
# Do some range checking
if f > _log_cache[127] or f <= 0:
return 128
# Binary search related algorithm to find the index
while begin != end:
n = (begin + end) // 2
c = _log_cache[n]
cp = _log_cache[n - 1] if n != 0 else 0
if cp < f <= c:
_last_asked = (n, f)
return n
if f < c:
end = n
else:
begin = n
_last_asked = (begin, f)
return begin | [
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bspaans/python-mingus | mingus/extra/fft.py | find_frequencies | def find_frequencies(data, freq=44100, bits=16):
"""Convert audio data into a frequency-amplitude table using fast fourier
transformation.
Return a list of tuples (frequency, amplitude).
Data should only contain one channel of audio.
"""
# Fast fourier transform
n = len(data)
p = _fft(data)
uniquePts = numpy.ceil((n + 1) / 2.0)
# Scale by the length (n) and square the value to get the amplitude
p = [(abs(x) / float(n)) ** 2 * 2 for x in p[0:uniquePts]]
p[0] = p[0] / 2
if n % 2 == 0:
p[-1] = p[-1] / 2
# Generate the frequencies and zip with the amplitudes
s = freq / float(n)
freqArray = numpy.arange(0, uniquePts * s, s)
return zip(freqArray, p) | python | def find_frequencies(data, freq=44100, bits=16):
"""Convert audio data into a frequency-amplitude table using fast fourier
transformation.
Return a list of tuples (frequency, amplitude).
Data should only contain one channel of audio.
"""
# Fast fourier transform
n = len(data)
p = _fft(data)
uniquePts = numpy.ceil((n + 1) / 2.0)
# Scale by the length (n) and square the value to get the amplitude
p = [(abs(x) / float(n)) ** 2 * 2 for x in p[0:uniquePts]]
p[0] = p[0] / 2
if n % 2 == 0:
p[-1] = p[-1] / 2
# Generate the frequencies and zip with the amplitudes
s = freq / float(n)
freqArray = numpy.arange(0, uniquePts * s, s)
return zip(freqArray, p) | [
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bspaans/python-mingus | mingus/extra/fft.py | find_Note | def find_Note(data, freq, bits):
"""Get the frequencies, feed them to find_notes and the return the Note
with the highest amplitude."""
data = find_frequencies(data, freq, bits)
return sorted(find_notes(data), key=operator.itemgetter(1))[-1][0] | python | def find_Note(data, freq, bits):
"""Get the frequencies, feed them to find_notes and the return the Note
with the highest amplitude."""
data = find_frequencies(data, freq, bits)
return sorted(find_notes(data), key=operator.itemgetter(1))[-1][0] | [
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bspaans/python-mingus | mingus/extra/fft.py | analyze_chunks | def analyze_chunks(data, freq, bits, chunksize=512):
"""Cut the one channel data in chunks and analyzes them separately.
Making the chunksize a power of two works fastest.
"""
res = []
while data != []:
f = find_frequencies(data[:chunksize], freq, bits)
res.append(sorted(find_notes(f), key=operator.itemgetter(1))[-1][0])
data = data[chunksize:]
return res | python | def analyze_chunks(data, freq, bits, chunksize=512):
"""Cut the one channel data in chunks and analyzes them separately.
Making the chunksize a power of two works fastest.
"""
res = []
while data != []:
f = find_frequencies(data[:chunksize], freq, bits)
res.append(sorted(find_notes(f), key=operator.itemgetter(1))[-1][0])
data = data[chunksize:]
return res | [
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bspaans/python-mingus | mingus/extra/fft.py | find_melody | def find_melody(file='440_480_clean.wav', chunksize=512):
"""Cut the sample into chunks and analyze each chunk.
Return a list [(Note, chunks)] where chunks is the number of chunks
where that note is the most dominant.
If two consequent chunks turn out to return the same Note they are
grouped together.
This is an experimental function.
"""
(data, freq, bits) = data_from_file(file)
res = []
for d in analyze_chunks(data, freq, bits, chunksize):
if res != []:
if res[-1][0] == d:
val = res[-1][1]
res[-1] = (d, val + 1)
else:
res.append((d, 1))
else:
res.append((d, 1))
return [(x, freq) for (x, freq) in res] | python | def find_melody(file='440_480_clean.wav', chunksize=512):
"""Cut the sample into chunks and analyze each chunk.
Return a list [(Note, chunks)] where chunks is the number of chunks
where that note is the most dominant.
If two consequent chunks turn out to return the same Note they are
grouped together.
This is an experimental function.
"""
(data, freq, bits) = data_from_file(file)
res = []
for d in analyze_chunks(data, freq, bits, chunksize):
if res != []:
if res[-1][0] == d:
val = res[-1][1]
res[-1] = (d, val + 1)
else:
res.append((d, 1))
else:
res.append((d, 1))
return [(x, freq) for (x, freq) in res] | [
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bspaans/python-mingus | mingus/midi/midi_file_out.py | write_Note | def write_Note(file, note, bpm=120, repeat=0, verbose=False):
"""Expect a Note object from mingus.containers and save it into a MIDI
file, specified in file.
You can set the velocity and channel in Note.velocity and Note.channel.
"""
m = MidiFile()
t = MidiTrack(bpm)
m.tracks = [t]
while repeat >= 0:
t.set_deltatime('\x00')
t.play_Note(note)
t.set_deltatime("\x48")
t.stop_Note(note)
repeat -= 1
return m.write_file(file, verbose) | python | def write_Note(file, note, bpm=120, repeat=0, verbose=False):
"""Expect a Note object from mingus.containers and save it into a MIDI
file, specified in file.
You can set the velocity and channel in Note.velocity and Note.channel.
"""
m = MidiFile()
t = MidiTrack(bpm)
m.tracks = [t]
while repeat >= 0:
t.set_deltatime('\x00')
t.play_Note(note)
t.set_deltatime("\x48")
t.stop_Note(note)
repeat -= 1
return m.write_file(file, verbose) | [
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bspaans/python-mingus | mingus/midi/midi_file_out.py | write_NoteContainer | def write_NoteContainer(file, notecontainer, bpm=120, repeat=0, verbose=False):
"""Write a mingus.NoteContainer to a MIDI file."""
m = MidiFile()
t = MidiTrack(bpm)
m.tracks = [t]
while repeat >= 0:
t.set_deltatime('\x00')
t.play_NoteContainer(notecontainer)
t.set_deltatime("\x48")
t.stop_NoteContainer(notecontainer)
repeat -= 1
return m.write_file(file, verbose) | python | def write_NoteContainer(file, notecontainer, bpm=120, repeat=0, verbose=False):
"""Write a mingus.NoteContainer to a MIDI file."""
m = MidiFile()
t = MidiTrack(bpm)
m.tracks = [t]
while repeat >= 0:
t.set_deltatime('\x00')
t.play_NoteContainer(notecontainer)
t.set_deltatime("\x48")
t.stop_NoteContainer(notecontainer)
repeat -= 1
return m.write_file(file, verbose) | [
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bspaans/python-mingus | mingus/midi/midi_file_out.py | write_Bar | def write_Bar(file, bar, bpm=120, repeat=0, verbose=False):
"""Write a mingus.Bar to a MIDI file.
Both the key and the meter are written to the file as well.
"""
m = MidiFile()
t = MidiTrack(bpm)
m.tracks = [t]
while repeat >= 0:
t.play_Bar(bar)
repeat -= 1
return m.write_file(file, verbose) | python | def write_Bar(file, bar, bpm=120, repeat=0, verbose=False):
"""Write a mingus.Bar to a MIDI file.
Both the key and the meter are written to the file as well.
"""
m = MidiFile()
t = MidiTrack(bpm)
m.tracks = [t]
while repeat >= 0:
t.play_Bar(bar)
repeat -= 1
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bspaans/python-mingus | mingus/midi/midi_file_out.py | write_Track | def write_Track(file, track, bpm=120, repeat=0, verbose=False):
"""Write a mingus.Track to a MIDI file.
Write the name to the file and set the instrument if the instrument has
the attribute instrument_nr, which represents the MIDI instrument
number. The class MidiInstrument in mingus.containers.Instrument has
this attribute by default.
"""
m = MidiFile()
t = MidiTrack(bpm)
m.tracks = [t]
while repeat >= 0:
t.play_Track(track)
repeat -= 1
return m.write_file(file, verbose) | python | def write_Track(file, track, bpm=120, repeat=0, verbose=False):
"""Write a mingus.Track to a MIDI file.
Write the name to the file and set the instrument if the instrument has
the attribute instrument_nr, which represents the MIDI instrument
number. The class MidiInstrument in mingus.containers.Instrument has
this attribute by default.
"""
m = MidiFile()
t = MidiTrack(bpm)
m.tracks = [t]
while repeat >= 0:
t.play_Track(track)
repeat -= 1
return m.write_file(file, verbose) | [
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bspaans/python-mingus | mingus/midi/midi_file_out.py | write_Composition | def write_Composition(file, composition, bpm=120, repeat=0, verbose=False):
"""Write a mingus.Composition to a MIDI file."""
m = MidiFile()
t = []
for x in range(len(composition.tracks)):
t += [MidiTrack(bpm)]
m.tracks = t
while repeat >= 0:
for i in range(len(composition.tracks)):
m.tracks[i].play_Track(composition.tracks[i])
repeat -= 1
return m.write_file(file, verbose) | python | def write_Composition(file, composition, bpm=120, repeat=0, verbose=False):
"""Write a mingus.Composition to a MIDI file."""
m = MidiFile()
t = []
for x in range(len(composition.tracks)):
t += [MidiTrack(bpm)]
m.tracks = t
while repeat >= 0:
for i in range(len(composition.tracks)):
m.tracks[i].play_Track(composition.tracks[i])
repeat -= 1
return m.write_file(file, verbose) | [
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bspaans/python-mingus | mingus/midi/midi_file_out.py | MidiFile.get_midi_data | def get_midi_data(self):
"""Collect and return the raw, binary MIDI data from the tracks."""
tracks = [t.get_midi_data() for t in self.tracks if t.track_data != '']
return self.header() + ''.join(tracks) | python | def get_midi_data(self):
"""Collect and return the raw, binary MIDI data from the tracks."""
tracks = [t.get_midi_data() for t in self.tracks if t.track_data != '']
return self.header() + ''.join(tracks) | [
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bspaans/python-mingus | mingus/midi/midi_file_out.py | MidiFile.header | def header(self):
"""Return a header for type 1 MIDI file."""
tracks = a2b_hex('%04x' % len([t for t in self.tracks if
t.track_data != '']))
return 'MThd\x00\x00\x00\x06\x00\x01' + tracks + self.time_division | python | def header(self):
"""Return a header for type 1 MIDI file."""
tracks = a2b_hex('%04x' % len([t for t in self.tracks if
t.track_data != '']))
return 'MThd\x00\x00\x00\x06\x00\x01' + tracks + self.time_division | [
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bspaans/python-mingus | mingus/midi/midi_file_out.py | MidiFile.write_file | def write_file(self, file, verbose=False):
"""Collect the data from get_midi_data and write to file."""
dat = self.get_midi_data()
try:
f = open(file, 'wb')
except:
print "Couldn't open '%s' for writing." % file
return False
try:
f.write(dat)
except:
print 'An error occured while writing data to %s.' % file
return False
f.close()
if verbose:
print 'Written %d bytes to %s.' % (len(dat), file)
return True | python | def write_file(self, file, verbose=False):
"""Collect the data from get_midi_data and write to file."""
dat = self.get_midi_data()
try:
f = open(file, 'wb')
except:
print "Couldn't open '%s' for writing." % file
return False
try:
f.write(dat)
except:
print 'An error occured while writing data to %s.' % file
return False
f.close()
if verbose:
print 'Written %d bytes to %s.' % (len(dat), file)
return True | [
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bspaans/python-mingus | mingus/extra/tunings.py | fingers_needed | def fingers_needed(fingering):
"""Return the number of fingers needed to play the given fingering."""
split = False # True if an open string must be played, thereby making any
# subsequent strings impossible to bar with the index finger
indexfinger = False # True if the index finger was already accounted for
# in the count
minimum = min(finger for finger in fingering if finger) # the index finger
# plays the lowest
# finger position
result = 0
for finger in reversed(fingering):
if finger == 0: # an open string is played
split = True # subsequent strings are impossible to bar with the
# index finger
else:
if not split and finger == minimum: # if an open string hasn't been
# played and this is a job for
# the index finger:
if not indexfinger: # if the index finger hasn't been accounted
# for:
result += 1
indexfinger = True # index finger has now been accounted for
else:
result += 1
return result | python | def fingers_needed(fingering):
"""Return the number of fingers needed to play the given fingering."""
split = False # True if an open string must be played, thereby making any
# subsequent strings impossible to bar with the index finger
indexfinger = False # True if the index finger was already accounted for
# in the count
minimum = min(finger for finger in fingering if finger) # the index finger
# plays the lowest
# finger position
result = 0
for finger in reversed(fingering):
if finger == 0: # an open string is played
split = True # subsequent strings are impossible to bar with the
# index finger
else:
if not split and finger == minimum: # if an open string hasn't been
# played and this is a job for
# the index finger:
if not indexfinger: # if the index finger hasn't been accounted
# for:
result += 1
indexfinger = True # index finger has now been accounted for
else:
result += 1
return result | [
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bspaans/python-mingus | mingus/extra/tunings.py | add_tuning | def add_tuning(instrument, description, tuning):
"""Add a new tuning to the index.
The instrument and description parameters should be strings; tuning
should be a list of strings or a list of lists to denote courses.
Example:
>>> std_strings = ['E-2', 'A-2', 'D-3', 'G-3', 'B-3', 'E-4']
>>> tuning.add_tuning('Guitar', 'standard', std_strings)
>>> tw_strings = [['E-2', 'E-3'], ['A-2', 'A-3'], ...........]
>>> tuning.add_tuning('Guitar', 'twelve string', tw_string)
"""
t = StringTuning(instrument, description, tuning)
if _known.has_key(str.upper(instrument)):
_known[str.upper(instrument)][1][str.upper(description)] = t
else:
_known[str.upper(instrument)] = (instrument,
{str.upper(description): t}) | python | def add_tuning(instrument, description, tuning):
"""Add a new tuning to the index.
The instrument and description parameters should be strings; tuning
should be a list of strings or a list of lists to denote courses.
Example:
>>> std_strings = ['E-2', 'A-2', 'D-3', 'G-3', 'B-3', 'E-4']
>>> tuning.add_tuning('Guitar', 'standard', std_strings)
>>> tw_strings = [['E-2', 'E-3'], ['A-2', 'A-3'], ...........]
>>> tuning.add_tuning('Guitar', 'twelve string', tw_string)
"""
t = StringTuning(instrument, description, tuning)
if _known.has_key(str.upper(instrument)):
_known[str.upper(instrument)][1][str.upper(description)] = t
else:
_known[str.upper(instrument)] = (instrument,
{str.upper(description): t}) | [
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Example:
>>> std_strings = ['E-2', 'A-2', 'D-3', 'G-3', 'B-3', 'E-4']
>>> tuning.add_tuning('Guitar', 'standard', std_strings)
>>> tw_strings = [['E-2', 'E-3'], ['A-2', 'A-3'], ...........]
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bspaans/python-mingus | mingus/extra/tunings.py | get_tuning | def get_tuning(instrument, description, nr_of_strings=None, nr_of_courses=None):
"""Get the first tuning that satisfies the constraints.
The instrument and description arguments are treated like
case-insensitive prefixes. So search for 'bass' is the same is
'Bass Guitar'.
Example:
>>> tunings.get_tuning('guitar', 'standard')
<tunings.StringTuning instance at 0x139ac20>
"""
searchi = str.upper(instrument)
searchd = str.upper(description)
keys = _known.keys()
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return tun
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if tun.count_strings() == nr_of_strings:
return tun
elif nr_of_strings is None and nr_of_courses is not None:
if tun.count_courses() == nr_of_courses:
return tun
else:
if tun.count_courses() == nr_of_courses\
and tun.count_strings() == nr_of_strings:
return tun | python | def get_tuning(instrument, description, nr_of_strings=None, nr_of_courses=None):
"""Get the first tuning that satisfies the constraints.
The instrument and description arguments are treated like
case-insensitive prefixes. So search for 'bass' is the same is
'Bass Guitar'.
Example:
>>> tunings.get_tuning('guitar', 'standard')
<tunings.StringTuning instance at 0x139ac20>
"""
searchi = str.upper(instrument)
searchd = str.upper(description)
keys = _known.keys()
for x in keys:
if (searchi not in keys and x.find(searchi) == 0 or searchi in keys and
x == searchi):
for (desc, tun) in _known[x][1].iteritems():
if desc.find(searchd) == 0:
if nr_of_strings is None and nr_of_courses is None:
return tun
elif nr_of_strings is not None and nr_of_courses is None:
if tun.count_strings() == nr_of_strings:
return tun
elif nr_of_strings is None and nr_of_courses is not None:
if tun.count_courses() == nr_of_courses:
return tun
else:
if tun.count_courses() == nr_of_courses\
and tun.count_strings() == nr_of_strings:
return tun | [
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bspaans/python-mingus | mingus/extra/tunings.py | get_tunings | def get_tunings(instrument=None, nr_of_strings=None, nr_of_courses=None):
"""Search tunings on instrument, strings, courses or a combination.
The instrument is actually treated like a case-insensitive prefix. So
asking for 'bass' yields the same tunings as 'Bass Guitar'; the string
'ba' yields all the instruments starting with 'ba'.
Example:
>>> tunings.get_tunings(nr_of_string = 4)
>>> tunings.get_tunings('bass')
"""
search = ''
if instrument is not None:
search = str.upper(instrument)
result = []
keys = _known.keys()
inkeys = search in keys
for x in keys:
if (instrument is None or not inkeys and x.find(search) == 0 or
inkeys and search == x):
if nr_of_strings is None and nr_of_courses is None:
result += _known[x][1].values()
elif nr_of_strings is not None and nr_of_courses is None:
result += [y for y in _known[x][1].itervalues()
if y.count_strings() == nr_of_strings]
elif nr_of_strings is None and nr_of_courses is not None:
result += [y for y in _known[x][1].itervalues()
if y.count_courses() == nr_of_courses]
else:
result += [y for y in _known[x][1].itervalues()
if y.count_strings() == nr_of_strings
and y.count_courses() == nr_of_courses]
return result | python | def get_tunings(instrument=None, nr_of_strings=None, nr_of_courses=None):
"""Search tunings on instrument, strings, courses or a combination.
The instrument is actually treated like a case-insensitive prefix. So
asking for 'bass' yields the same tunings as 'Bass Guitar'; the string
'ba' yields all the instruments starting with 'ba'.
Example:
>>> tunings.get_tunings(nr_of_string = 4)
>>> tunings.get_tunings('bass')
"""
search = ''
if instrument is not None:
search = str.upper(instrument)
result = []
keys = _known.keys()
inkeys = search in keys
for x in keys:
if (instrument is None or not inkeys and x.find(search) == 0 or
inkeys and search == x):
if nr_of_strings is None and nr_of_courses is None:
result += _known[x][1].values()
elif nr_of_strings is not None and nr_of_courses is None:
result += [y for y in _known[x][1].itervalues()
if y.count_strings() == nr_of_strings]
elif nr_of_strings is None and nr_of_courses is not None:
result += [y for y in _known[x][1].itervalues()
if y.count_courses() == nr_of_courses]
else:
result += [y for y in _known[x][1].itervalues()
if y.count_strings() == nr_of_strings
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return result | [
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>>> tunings.get_tunings('bass') | [
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bspaans/python-mingus | mingus/extra/tunings.py | StringTuning.count_courses | def count_courses(self):
"""Return the average number of courses per string."""
c = 0
for x in self.tuning:
if type(x) == list:
c += len(x)
else:
c += 1
return float(c) / len(self.tuning) | python | def count_courses(self):
"""Return the average number of courses per string."""
c = 0
for x in self.tuning:
if type(x) == list:
c += len(x)
else:
c += 1
return float(c) / len(self.tuning) | [
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bspaans/python-mingus | mingus/extra/tunings.py | StringTuning.find_frets | def find_frets(self, note, maxfret=24):
"""Return a list with for each string the fret on which the note is
played or None if it can't be played on that particular string.
The maxfret parameter is the highest fret that can be played; note
should either be a string or a Note object.
Example:
>>> t = tunings.StringTuning('test', 'test', ['A-3', 'E-4'])
>>> t.find_frets(Note('C-4')
[3, None]
>>> t.find_frets(Note('A-4')
[12, 5]
"""
result = []
if type(note) == str:
note = Note(note)
for x in self.tuning:
if type(x) == list:
base = x[0]
else:
base = x
diff = base.measure(note)
if 0 <= diff <= maxfret:
result.append(diff)
else:
result.append(None)
return result | python | def find_frets(self, note, maxfret=24):
"""Return a list with for each string the fret on which the note is
played or None if it can't be played on that particular string.
The maxfret parameter is the highest fret that can be played; note
should either be a string or a Note object.
Example:
>>> t = tunings.StringTuning('test', 'test', ['A-3', 'E-4'])
>>> t.find_frets(Note('C-4')
[3, None]
>>> t.find_frets(Note('A-4')
[12, 5]
"""
result = []
if type(note) == str:
note = Note(note)
for x in self.tuning:
if type(x) == list:
base = x[0]
else:
base = x
diff = base.measure(note)
if 0 <= diff <= maxfret:
result.append(diff)
else:
result.append(None)
return result | [
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should either be a string or a Note object.
Example:
>>> t = tunings.StringTuning('test', 'test', ['A-3', 'E-4'])
>>> t.find_frets(Note('C-4')
[3, None]
>>> t.find_frets(Note('A-4')
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bspaans/python-mingus | mingus/extra/tunings.py | StringTuning.frets_to_NoteContainer | def frets_to_NoteContainer(self, fingering):
"""Convert a list such as returned by find_fret to a NoteContainer."""
res = []
for (string, fret) in enumerate(fingering):
if fret is not None:
res.append(self.get_Note(string, fret))
return NoteContainer(res) | python | def frets_to_NoteContainer(self, fingering):
"""Convert a list such as returned by find_fret to a NoteContainer."""
res = []
for (string, fret) in enumerate(fingering):
if fret is not None:
res.append(self.get_Note(string, fret))
return NoteContainer(res) | [
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bspaans/python-mingus | mingus/extra/tunings.py | StringTuning.get_Note | def get_Note(self, string=0, fret=0, maxfret=24):
"""Return the Note on 'string', 'fret'.
Throw a RangeError if either the fret or string is unplayable.
Examples:
>>> t = tunings.StringTuning('test', 'test', ['A-3', 'A-4'])
>>> t,get_Note(0, 0)
'A-3'
>>> t.get_Note(0, 1)
'A#-3'
>>> t.get_Note(1, 0)
'A-4'
"""
if 0 <= string < self.count_strings():
if 0 <= fret <= maxfret:
s = self.tuning[string]
if type(s) == list:
s = s[0]
n = Note(int(s) + fret)
n.string = string
n.fret = fret
return n
else:
raise RangeError("Fret '%d' on string '%d' is out of range"
% (string, fret))
else:
raise RangeError("String '%d' out of range" % string) | python | def get_Note(self, string=0, fret=0, maxfret=24):
"""Return the Note on 'string', 'fret'.
Throw a RangeError if either the fret or string is unplayable.
Examples:
>>> t = tunings.StringTuning('test', 'test', ['A-3', 'A-4'])
>>> t,get_Note(0, 0)
'A-3'
>>> t.get_Note(0, 1)
'A#-3'
>>> t.get_Note(1, 0)
'A-4'
"""
if 0 <= string < self.count_strings():
if 0 <= fret <= maxfret:
s = self.tuning[string]
if type(s) == list:
s = s[0]
n = Note(int(s) + fret)
n.string = string
n.fret = fret
return n
else:
raise RangeError("Fret '%d' on string '%d' is out of range"
% (string, fret))
else:
raise RangeError("String '%d' out of range" % string) | [
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>>> t,get_Note(0, 0)
'A-3'
>>> t.get_Note(0, 1)
'A#-3'
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bspaans/python-mingus | mingus_examples/pygame-drum/pygame-drum.py | load_img | def load_img(name):
"""Load image and return an image object"""
fullname = name
try:
image = pygame.image.load(fullname)
if image.get_alpha() is None:
image = image.convert()
else:
image = image.convert_alpha()
except pygame.error, message:
print "Error: couldn't load image: ", fullname
raise SystemExit, message
return (image, image.get_rect()) | python | def load_img(name):
"""Load image and return an image object"""
fullname = name
try:
image = pygame.image.load(fullname)
if image.get_alpha() is None:
image = image.convert()
else:
image = image.convert_alpha()
except pygame.error, message:
print "Error: couldn't load image: ", fullname
raise SystemExit, message
return (image, image.get_rect()) | [
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bspaans/python-mingus | mingus_examples/pygame-drum/pygame-drum.py | play_note | def play_note(note):
"""play_note determines which pad was 'hit' and send the
play request to fluidsynth"""
index = None
if note == Note('B', 2):
index = 0
elif note == Note('A', 2):
index = 1
elif note == Note('G', 2):
index = 2
elif note == Note('E', 2):
index = 3
elif note == Note('C', 2):
index = 4
elif note == Note('A', 3):
index = 5
elif note == Note('B', 3):
index = 6
elif note == Note('A#', 2):
index = 7
elif note == Note('G#', 2):
index = 8
if index != None and status == 'record':
playing.append([index, tick])
recorded.append([index, tick, note])
recorded_buffer.append([index, tick])
fluidsynth.play_Note(note, 9, 100) | python | def play_note(note):
"""play_note determines which pad was 'hit' and send the
play request to fluidsynth"""
index = None
if note == Note('B', 2):
index = 0
elif note == Note('A', 2):
index = 1
elif note == Note('G', 2):
index = 2
elif note == Note('E', 2):
index = 3
elif note == Note('C', 2):
index = 4
elif note == Note('A', 3):
index = 5
elif note == Note('B', 3):
index = 6
elif note == Note('A#', 2):
index = 7
elif note == Note('G#', 2):
index = 8
if index != None and status == 'record':
playing.append([index, tick])
recorded.append([index, tick, note])
recorded_buffer.append([index, tick])
fluidsynth.play_Note(note, 9, 100) | [
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bspaans/python-mingus | mingus_examples/pygame-piano/pygame-piano.py | play_note | def play_note(note):
"""play_note determines the coordinates of a note on the keyboard image
and sends a request to play the note to the fluidsynth server"""
global text
octave_offset = (note.octave - LOWEST) * width
if note.name in WHITE_KEYS:
# Getting the x coordinate of a white key can be done automatically
w = WHITE_KEYS.index(note.name) * white_key_width
w = w + octave_offset
# Add a list containing the x coordinate, the tick at the current time
# and of course the note itself to playing_w
playing_w.append([w, tick, note])
else:
# For black keys I hard coded the x coordinates. It's ugly.
i = BLACK_KEYS.index(note.name)
if i == 0:
w = 18
elif i == 1:
w = 58
elif i == 2:
w = 115
elif i == 3:
w = 151
else:
w = 187
w = w + octave_offset
playing_b.append([w, tick, note])
# To find out what sort of chord is being played we have to look at both the
# white and black keys, obviously:
notes = playing_w + playing_b
notes.sort()
notenames = []
for n in notes:
notenames.append(n[2].name)
# Determine the chord
det = chords.determine(notenames)
if det != []:
det = det[0]
else:
det = ''
# And render it onto the text surface
t = font.render(det, 2, (0, 0, 0))
text.fill((255, 255, 255))
text.blit(t, (0, 0))
# Play the note
fluidsynth.play_Note(note, channel, 100) | python | def play_note(note):
"""play_note determines the coordinates of a note on the keyboard image
and sends a request to play the note to the fluidsynth server"""
global text
octave_offset = (note.octave - LOWEST) * width
if note.name in WHITE_KEYS:
# Getting the x coordinate of a white key can be done automatically
w = WHITE_KEYS.index(note.name) * white_key_width
w = w + octave_offset
# Add a list containing the x coordinate, the tick at the current time
# and of course the note itself to playing_w
playing_w.append([w, tick, note])
else:
# For black keys I hard coded the x coordinates. It's ugly.
i = BLACK_KEYS.index(note.name)
if i == 0:
w = 18
elif i == 1:
w = 58
elif i == 2:
w = 115
elif i == 3:
w = 151
else:
w = 187
w = w + octave_offset
playing_b.append([w, tick, note])
# To find out what sort of chord is being played we have to look at both the
# white and black keys, obviously:
notes = playing_w + playing_b
notes.sort()
notenames = []
for n in notes:
notenames.append(n[2].name)
# Determine the chord
det = chords.determine(notenames)
if det != []:
det = det[0]
else:
det = ''
# And render it onto the text surface
t = font.render(det, 2, (0, 0, 0))
text.fill((255, 255, 255))
text.blit(t, (0, 0))
# Play the note
fluidsynth.play_Note(note, channel, 100) | [
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bspaans/python-mingus | mingus/containers/suite.py | Suite.add_composition | def add_composition(self, composition):
"""Add a composition to the suite.
Raise an UnexpectedObjectError when the supplied argument is not a
Composition object.
"""
if not hasattr(composition, 'tracks'):
raise UnexpectedObjectError("Object '%s' not expected. Expecting "
"a mingus.containers.Composition object." % composition)
self.compositions.append(composition)
return self | python | def add_composition(self, composition):
"""Add a composition to the suite.
Raise an UnexpectedObjectError when the supplied argument is not a
Composition object.
"""
if not hasattr(composition, 'tracks'):
raise UnexpectedObjectError("Object '%s' not expected. Expecting "
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self.compositions.append(composition)
return self | [
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bspaans/python-mingus | mingus/containers/suite.py | Suite.set_author | def set_author(self, author, email=''):
"""Set the author of the suite."""
self.author = author
self.email = email | python | def set_author(self, author, email=''):
"""Set the author of the suite."""
self.author = author
self.email = email | [
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bspaans/python-mingus | mingus/containers/suite.py | Suite.set_title | def set_title(self, title, subtitle=''):
"""Set the title and the subtitle of the suite."""
self.title = title
self.subtitle = subtitle | python | def set_title(self, title, subtitle=''):
"""Set the title and the subtitle of the suite."""
self.title = title
self.subtitle = subtitle | [
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bspaans/python-mingus | mingus/containers/instrument.py | Instrument.set_range | def set_range(self, range):
"""Set the range of the instrument.
A range is a tuple of two Notes or note strings.
"""
if type(range[0]) == str:
range[0] = Note(range[0])
range[1] = Note(range[1])
if not hasattr(range[0], 'name'):
raise UnexpectedObjectError("Unexpected object '%s'. "
"Expecting a mingus.containers.Note object" % range[0])
self.range = range | python | def set_range(self, range):
"""Set the range of the instrument.
A range is a tuple of two Notes or note strings.
"""
if type(range[0]) == str:
range[0] = Note(range[0])
range[1] = Note(range[1])
if not hasattr(range[0], 'name'):
raise UnexpectedObjectError("Unexpected object '%s'. "
"Expecting a mingus.containers.Note object" % range[0])
self.range = range | [
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bspaans/python-mingus | mingus/containers/instrument.py | Instrument.note_in_range | def note_in_range(self, note):
"""Test whether note is in the range of this Instrument.
Return True if so, False otherwise.
"""
if type(note) == str:
note = Note(note)
if not hasattr(note, 'name'):
raise UnexpectedObjectError("Unexpected object '%s'. "
"Expecting a mingus.containers.Note object" % note)
if note >= self.range[0] and note <= self.range[1]:
return True
return False | python | def note_in_range(self, note):
"""Test whether note is in the range of this Instrument.
Return True if so, False otherwise.
"""
if type(note) == str:
note = Note(note)
if not hasattr(note, 'name'):
raise UnexpectedObjectError("Unexpected object '%s'. "
"Expecting a mingus.containers.Note object" % note)
if note >= self.range[0] and note <= self.range[1]:
return True
return False | [
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bspaans/python-mingus | mingus/containers/instrument.py | Instrument.can_play_notes | def can_play_notes(self, notes):
"""Test if the notes lie within the range of the instrument.
Return True if so, False otherwise.
"""
if hasattr(notes, 'notes'):
notes = notes.notes
if type(notes) != list:
notes = [notes]
for n in notes:
if not self.note_in_range(n):
return False
return True | python | def can_play_notes(self, notes):
"""Test if the notes lie within the range of the instrument.
Return True if so, False otherwise.
"""
if hasattr(notes, 'notes'):
notes = notes.notes
if type(notes) != list:
notes = [notes]
for n in notes:
if not self.note_in_range(n):
return False
return True | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.play_Note | def play_Note(self, note):
"""Convert a Note object to a midi event and adds it to the
track_data.
To set the channel on which to play this note, set Note.channel, the
same goes for Note.velocity.
"""
velocity = 64
channel = 1
if hasattr(note, 'dynamics'):
if 'velocity' in note.dynamics:
velocity = note.dynamics['velocity']
if 'channel' in note.dynamics:
channel = note.dynamics['channel']
if hasattr(note, 'channel'):
channel = note.channel
if hasattr(note, 'velocity'):
velocity = note.velocity
if self.change_instrument:
self.set_instrument(channel, self.instrument)
self.change_instrument = False
self.track_data += self.note_on(channel, int(note) + 12, velocity) | python | def play_Note(self, note):
"""Convert a Note object to a midi event and adds it to the
track_data.
To set the channel on which to play this note, set Note.channel, the
same goes for Note.velocity.
"""
velocity = 64
channel = 1
if hasattr(note, 'dynamics'):
if 'velocity' in note.dynamics:
velocity = note.dynamics['velocity']
if 'channel' in note.dynamics:
channel = note.dynamics['channel']
if hasattr(note, 'channel'):
channel = note.channel
if hasattr(note, 'velocity'):
velocity = note.velocity
if self.change_instrument:
self.set_instrument(channel, self.instrument)
self.change_instrument = False
self.track_data += self.note_on(channel, int(note) + 12, velocity) | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.play_NoteContainer | def play_NoteContainer(self, notecontainer):
"""Convert a mingus.containers.NoteContainer to the equivalent MIDI
events and add it to the track_data.
Note.channel and Note.velocity can be set as well.
"""
if len(notecontainer) <= 1:
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[self.play_Note(x) for x in notecontainer[1:]] | python | def play_NoteContainer(self, notecontainer):
"""Convert a mingus.containers.NoteContainer to the equivalent MIDI
events and add it to the track_data.
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"""
if len(notecontainer) <= 1:
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.play_Bar | def play_Bar(self, bar):
"""Convert a Bar object to MIDI events and write them to the
track_data."""
self.set_deltatime(self.delay)
self.delay = 0
self.set_meter(bar.meter)
self.set_deltatime(0)
self.set_key(bar.key)
for x in bar:
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self.delay += tick
else:
self.set_deltatime(self.delay)
self.delay = 0
if hasattr(x[2], 'bpm'):
self.set_deltatime(0)
self.set_tempo(x[2].bpm)
self.play_NoteContainer(x[2])
self.set_deltatime(self.int_to_varbyte(tick))
self.stop_NoteContainer(x[2]) | python | def play_Bar(self, bar):
"""Convert a Bar object to MIDI events and write them to the
track_data."""
self.set_deltatime(self.delay)
self.delay = 0
self.set_meter(bar.meter)
self.set_deltatime(0)
self.set_key(bar.key)
for x in bar:
tick = int(round((1.0 / x[1]) * 288))
if x[2] is None or len(x[2]) == 0:
self.delay += tick
else:
self.set_deltatime(self.delay)
self.delay = 0
if hasattr(x[2], 'bpm'):
self.set_deltatime(0)
self.set_tempo(x[2].bpm)
self.play_NoteContainer(x[2])
self.set_deltatime(self.int_to_varbyte(tick))
self.stop_NoteContainer(x[2]) | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.play_Track | def play_Track(self, track):
"""Convert a Track object to MIDI events and write them to the
track_data."""
if hasattr(track, 'name'):
self.set_track_name(track.name)
self.delay = 0
instr = track.instrument
if hasattr(instr, 'instrument_nr'):
self.change_instrument = True
self.instrument = instr.instrument_nr
for bar in track:
self.play_Bar(bar) | python | def play_Track(self, track):
"""Convert a Track object to MIDI events and write them to the
track_data."""
if hasattr(track, 'name'):
self.set_track_name(track.name)
self.delay = 0
instr = track.instrument
if hasattr(instr, 'instrument_nr'):
self.change_instrument = True
self.instrument = instr.instrument_nr
for bar in track:
self.play_Bar(bar) | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.stop_Note | def stop_Note(self, note):
"""Add a note_off event for note to event_track."""
velocity = 64
channel = 1
if hasattr(note, 'dynamics'):
if 'velocity' in note.dynamics:
velocity = note.dynamics['velocity']
if 'channel' in note.dynamics:
channel = note.dynamics['channel']
if hasattr(note, 'channel'):
channel = note.channel
if hasattr(note, 'velocity'):
velocity = note.velocity
self.track_data += self.note_off(channel, int(note) + 12, velocity) | python | def stop_Note(self, note):
"""Add a note_off event for note to event_track."""
velocity = 64
channel = 1
if hasattr(note, 'dynamics'):
if 'velocity' in note.dynamics:
velocity = note.dynamics['velocity']
if 'channel' in note.dynamics:
channel = note.dynamics['channel']
if hasattr(note, 'channel'):
channel = note.channel
if hasattr(note, 'velocity'):
velocity = note.velocity
self.track_data += self.note_off(channel, int(note) + 12, velocity) | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.stop_NoteContainer | def stop_NoteContainer(self, notecontainer):
"""Add note_off events for each note in the NoteContainer to the
track_data."""
# if there is more than one note in the container, the deltatime should
# be set back to zero after the first one has been stopped
if len(notecontainer) <= 1:
[self.stop_Note(x) for x in notecontainer]
else:
self.stop_Note(notecontainer[0])
self.set_deltatime(0)
[self.stop_Note(x) for x in notecontainer[1:]] | python | def stop_NoteContainer(self, notecontainer):
"""Add note_off events for each note in the NoteContainer to the
track_data."""
# if there is more than one note in the container, the deltatime should
# be set back to zero after the first one has been stopped
if len(notecontainer) <= 1:
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else:
self.stop_Note(notecontainer[0])
self.set_deltatime(0)
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.set_instrument | def set_instrument(self, channel, instr, bank=1):
"""Add a program change and bank select event to the track_data."""
self.track_data += self.select_bank(channel, bank)
self.track_data += self.program_change_event(channel, instr) | python | def set_instrument(self, channel, instr, bank=1):
"""Add a program change and bank select event to the track_data."""
self.track_data += self.select_bank(channel, bank)
self.track_data += self.program_change_event(channel, instr) | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.header | def header(self):
"""Return the bytes for the header of track.
The header contains the length of the track_data, so you'll have to
call this function when you're done adding data (when you're not
using get_midi_data).
"""
chunk_size = a2b_hex('%08x' % (len(self.track_data)
+ len(self.end_of_track())))
return TRACK_HEADER + chunk_size | python | def header(self):
"""Return the bytes for the header of track.
The header contains the length of the track_data, so you'll have to
call this function when you're done adding data (when you're not
using get_midi_data).
"""
chunk_size = a2b_hex('%08x' % (len(self.track_data)
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return TRACK_HEADER + chunk_size | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.midi_event | def midi_event(self, event_type, channel, param1, param2=None):
"""Convert and return the paraters as a MIDI event in bytes."""
assert event_type < 0x80 and event_type >= 0
assert channel < 16 and channel >= 0
tc = a2b_hex('%x%x' % (event_type, channel))
if param2 is None:
params = a2b_hex('%02x' % param1)
else:
params = a2b_hex('%02x%02x' % (param1, param2))
return self.delta_time + tc + params | python | def midi_event(self, event_type, channel, param1, param2=None):
"""Convert and return the paraters as a MIDI event in bytes."""
assert event_type < 0x80 and event_type >= 0
assert channel < 16 and channel >= 0
tc = a2b_hex('%x%x' % (event_type, channel))
if param2 is None:
params = a2b_hex('%02x' % param1)
else:
params = a2b_hex('%02x%02x' % (param1, param2))
return self.delta_time + tc + params | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.note_off | def note_off(self, channel, note, velocity):
"""Return bytes for a 'note off' event."""
return self.midi_event(NOTE_OFF, channel, note, velocity) | python | def note_off(self, channel, note, velocity):
"""Return bytes for a 'note off' event."""
return self.midi_event(NOTE_OFF, channel, note, velocity) | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.note_on | def note_on(self, channel, note, velocity):
"""Return bytes for a 'note_on' event."""
return self.midi_event(NOTE_ON, channel, note, velocity) | python | def note_on(self, channel, note, velocity):
"""Return bytes for a 'note_on' event."""
return self.midi_event(NOTE_ON, channel, note, velocity) | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.controller_event | def controller_event(self, channel, contr_nr, contr_val):
"""Return the bytes for a MIDI controller event."""
return self.midi_event(CONTROLLER, channel, contr_nr, contr_val) | python | def controller_event(self, channel, contr_nr, contr_val):
"""Return the bytes for a MIDI controller event."""
return self.midi_event(CONTROLLER, channel, contr_nr, contr_val) | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.set_deltatime | def set_deltatime(self, delta_time):
"""Set the delta_time.
Can be an integer or a variable length byte.
"""
if type(delta_time) == int:
delta_time = self.int_to_varbyte(delta_time)
self.delta_time = delta_time | python | def set_deltatime(self, delta_time):
"""Set the delta_time.
Can be an integer or a variable length byte.
"""
if type(delta_time) == int:
delta_time = self.int_to_varbyte(delta_time)
self.delta_time = delta_time | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.set_tempo | def set_tempo(self, bpm):
"""Convert the bpm to a midi event and write it to the track_data."""
self.bpm = bpm
self.track_data += self.set_tempo_event(self.bpm) | python | def set_tempo(self, bpm):
"""Convert the bpm to a midi event and write it to the track_data."""
self.bpm = bpm
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.set_tempo_event | def set_tempo_event(self, bpm):
"""Calculate the microseconds per quarter note."""
ms_per_min = 60000000
mpqn = a2b_hex('%06x' % (ms_per_min / bpm))
return self.delta_time + META_EVENT + SET_TEMPO + '\x03' + mpqn | python | def set_tempo_event(self, bpm):
"""Calculate the microseconds per quarter note."""
ms_per_min = 60000000
mpqn = a2b_hex('%06x' % (ms_per_min / bpm))
return self.delta_time + META_EVENT + SET_TEMPO + '\x03' + mpqn | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.time_signature_event | def time_signature_event(self, meter=(4, 4)):
"""Return a time signature event for meter."""
numer = a2b_hex('%02x' % meter[0])
denom = a2b_hex('%02x' % int(log(meter[1], 2)))
return self.delta_time + META_EVENT + TIME_SIGNATURE + '\x04' + numer\
+ denom + '\x18\x08' | python | def time_signature_event(self, meter=(4, 4)):
"""Return a time signature event for meter."""
numer = a2b_hex('%02x' % meter[0])
denom = a2b_hex('%02x' % int(log(meter[1], 2)))
return self.delta_time + META_EVENT + TIME_SIGNATURE + '\x04' + numer\
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.set_key | def set_key(self, key='C'):
"""Add a key signature event to the track_data."""
if isinstance(key, Key):
key = key.name[0]
self.track_data += self.key_signature_event(key) | python | def set_key(self, key='C'):
"""Add a key signature event to the track_data."""
if isinstance(key, Key):
key = key.name[0]
self.track_data += self.key_signature_event(key) | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.key_signature_event | def key_signature_event(self, key='C'):
"""Return the bytes for a key signature event."""
if key.islower():
val = minor_keys.index(key) - 7
mode = '\x01'
else:
val = major_keys.index(key) - 7
mode = '\x00'
if val < 0:
val = 256 + val
key = a2b_hex('%02x' % val)
return '{0}{1}{2}\x02{3}{4}'.format(self.delta_time, META_EVENT,
KEY_SIGNATURE, key, mode) | python | def key_signature_event(self, key='C'):
"""Return the bytes for a key signature event."""
if key.islower():
val = minor_keys.index(key) - 7
mode = '\x01'
else:
val = major_keys.index(key) - 7
mode = '\x00'
if val < 0:
val = 256 + val
key = a2b_hex('%02x' % val)
return '{0}{1}{2}\x02{3}{4}'.format(self.delta_time, META_EVENT,
KEY_SIGNATURE, key, mode) | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.track_name_event | def track_name_event(self, name):
"""Return the bytes for a track name meta event."""
l = self.int_to_varbyte(len(name))
return '\x00' + META_EVENT + TRACK_NAME + l + name | python | def track_name_event(self, name):
"""Return the bytes for a track name meta event."""
l = self.int_to_varbyte(len(name))
return '\x00' + META_EVENT + TRACK_NAME + l + name | [
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bspaans/python-mingus | mingus/midi/midi_track.py | MidiTrack.int_to_varbyte | def int_to_varbyte(self, value):
"""Convert an integer into a variable length byte.
How it works: the bytes are stored in big-endian (significant bit
first), the highest bit of the byte (mask 0x80) is set when there
are more bytes following. The remaining 7 bits (mask 0x7F) are used
to store the value.
"""
# Warning: bit kung-fu ahead. The length of the integer in bytes
length = int(log(max(value, 1), 0x80)) + 1
# Remove the highest bit and move the bits to the right if length > 1
bytes = [value >> i * 7 & 0x7F for i in range(length)]
bytes.reverse()
# Set the first bit on every one but the last bit.
for i in range(len(bytes) - 1):
bytes[i] = bytes[i] | 0x80
return pack('%sB' % len(bytes), *bytes) | python | def int_to_varbyte(self, value):
"""Convert an integer into a variable length byte.
How it works: the bytes are stored in big-endian (significant bit
first), the highest bit of the byte (mask 0x80) is set when there
are more bytes following. The remaining 7 bits (mask 0x7F) are used
to store the value.
"""
# Warning: bit kung-fu ahead. The length of the integer in bytes
length = int(log(max(value, 1), 0x80)) + 1
# Remove the highest bit and move the bits to the right if length > 1
bytes = [value >> i * 7 & 0x7F for i in range(length)]
bytes.reverse()
# Set the first bit on every one but the last bit.
for i in range(len(bytes) - 1):
bytes[i] = bytes[i] | 0x80
return pack('%sB' % len(bytes), *bytes) | [
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bspaans/python-mingus | mingus/core/progressions.py | to_chords | def to_chords(progression, key='C'):
"""Convert a list of chord functions or a string to a list of chords.
Examples:
>>> to_chords(['I', 'V7'])
[['C', 'E', 'G'], ['G', 'B', 'D', 'F']]
>>> to_chords('I7')
[['C', 'E', 'G', 'B']]
Any number of accidentals can be used as prefix to augment or diminish;
for example: bIV or #I.
All the chord abbreviations in the chord module can be used as suffixes;
for example: Im7, IVdim7, etc.
You can combine prefixes and suffixes to manage complex progressions:
#vii7, #iidim7, iii7, etc.
Using 7 as suffix is ambiguous, since it is classicly used to denote the
seventh chord when talking about progressions instead of just the
dominant seventh chord. We have taken the classic route; I7 will get
you a major seventh chord. If you specifically want a dominanth seventh,
use Idom7.
"""
if type(progression) == str:
progression = [progression]
result = []
for chord in progression:
# strip preceding accidentals from the string
(roman_numeral, acc, suffix) = parse_string(chord)
# There is no roman numeral parsing, just a simple check. Sorry to
# disappoint. warning Should throw exception
if roman_numeral not in numerals:
return []
# These suffixes don't need any post processing
if suffix == '7' or suffix == '':
roman_numeral += suffix
# ahh Python. Everything is a dict.
r = chords.__dict__[roman_numeral](key)
else:
r = chords.__dict__[roman_numeral](key)
r = chords.chord_shorthand[suffix](r[0])
while acc < 0:
r = map(notes.diminish, r)
acc += 1
while acc > 0:
r = map(notes.augment, r)
acc -= 1
result.append(r)
return result | python | def to_chords(progression, key='C'):
"""Convert a list of chord functions or a string to a list of chords.
Examples:
>>> to_chords(['I', 'V7'])
[['C', 'E', 'G'], ['G', 'B', 'D', 'F']]
>>> to_chords('I7')
[['C', 'E', 'G', 'B']]
Any number of accidentals can be used as prefix to augment or diminish;
for example: bIV or #I.
All the chord abbreviations in the chord module can be used as suffixes;
for example: Im7, IVdim7, etc.
You can combine prefixes and suffixes to manage complex progressions:
#vii7, #iidim7, iii7, etc.
Using 7 as suffix is ambiguous, since it is classicly used to denote the
seventh chord when talking about progressions instead of just the
dominant seventh chord. We have taken the classic route; I7 will get
you a major seventh chord. If you specifically want a dominanth seventh,
use Idom7.
"""
if type(progression) == str:
progression = [progression]
result = []
for chord in progression:
# strip preceding accidentals from the string
(roman_numeral, acc, suffix) = parse_string(chord)
# There is no roman numeral parsing, just a simple check. Sorry to
# disappoint. warning Should throw exception
if roman_numeral not in numerals:
return []
# These suffixes don't need any post processing
if suffix == '7' or suffix == '':
roman_numeral += suffix
# ahh Python. Everything is a dict.
r = chords.__dict__[roman_numeral](key)
else:
r = chords.__dict__[roman_numeral](key)
r = chords.chord_shorthand[suffix](r[0])
while acc < 0:
r = map(notes.diminish, r)
acc += 1
while acc > 0:
r = map(notes.augment, r)
acc -= 1
result.append(r)
return result | [
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>>> to_chords('I7')
[['C', 'E', 'G', 'B']]
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All the chord abbreviations in the chord module can be used as suffixes;
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bspaans/python-mingus | mingus/core/progressions.py | determine | def determine(chord, key, shorthand=False):
"""Determine the harmonic function of chord in key.
This function can also deal with lists of chords.
Examples:
>>> determine(['C', 'E', 'G'], 'C')
['tonic']
>>> determine(['G', 'B', 'D'], 'C')
['dominant']
>>> determine(['G', 'B', 'D', 'F'], 'C', True)
['V7']
>>> determine([['C', 'E', 'G'], ['G', 'B', 'D']], 'C', True)
[['I'], ['V']]
"""
result = []
# Handle lists of chords
if type(chord[0]) == list:
for c in chord:
result.append(determine(c, key, shorthand))
return result
func_dict = {
'I': 'tonic',
'ii': 'supertonic',
'iii': 'mediant',
'IV': 'subdominant',
'V': 'dominant',
'vi': 'submediant',
'vii': 'subtonic',
}
expected_chord = [
['I', 'M', 'M7'],
['ii', 'm', 'm7'],
['iii', 'm', 'm7'],
['IV', 'M', 'M7'],
['V', 'M', '7'],
['vi', 'm', 'm7'],
['vii', 'dim', 'm7b5'],
]
type_of_chord = chords.determine(chord, True, False, True)
for chord in type_of_chord:
name = chord[0]
# Get accidentals
a = 1
for n in chord[1:]:
if n == 'b':
name += 'b'
elif n == '#':
name += '#'
else:
break
a += 1
chord_type = chord[a:]
# Determine chord function
(interval_type, interval) = intervals.determine(key, name).split(' ')
if interval == 'unison':
func = 'I'
elif interval == 'second':
func = 'ii'
elif interval == 'third':
func = 'iii'
elif interval == 'fourth':
func = 'IV'
elif interval == 'fifth':
func = 'V'
elif interval == 'sixth':
func = 'vi'
elif interval == 'seventh':
func = 'vii'
# Check whether the chord is altered or not
for x in expected_chord:
if x[0] == func:
# Triads
if chord_type == x[1]:
if not shorthand:
func = func_dict[func]
elif chord_type == x[2]:
# Sevenths
if shorthand:
func += '7'
else:
func = func_dict[func] + ' seventh'
else:
# Other
if shorthand:
func += chord_type
else:
func = func_dict[func]\
+ chords.chord_shorthand_meaning[chord_type]
# Handle b's and #'s (for instance Dbm in key C is bII)
if shorthand:
if interval_type == 'minor':
func = 'b' + func
elif interval_type == 'augmented':
func = '#' + func
elif interval_type == 'diminished':
func = 'bb' + func
else:
if interval_type == 'minor':
func = 'minor ' + func
elif interval_type == 'augmented':
func = 'augmented ' + func
elif interval_type == 'diminished':
func = 'diminished ' + func
# Add to results
result.append(func)
return result | python | def determine(chord, key, shorthand=False):
"""Determine the harmonic function of chord in key.
This function can also deal with lists of chords.
Examples:
>>> determine(['C', 'E', 'G'], 'C')
['tonic']
>>> determine(['G', 'B', 'D'], 'C')
['dominant']
>>> determine(['G', 'B', 'D', 'F'], 'C', True)
['V7']
>>> determine([['C', 'E', 'G'], ['G', 'B', 'D']], 'C', True)
[['I'], ['V']]
"""
result = []
# Handle lists of chords
if type(chord[0]) == list:
for c in chord:
result.append(determine(c, key, shorthand))
return result
func_dict = {
'I': 'tonic',
'ii': 'supertonic',
'iii': 'mediant',
'IV': 'subdominant',
'V': 'dominant',
'vi': 'submediant',
'vii': 'subtonic',
}
expected_chord = [
['I', 'M', 'M7'],
['ii', 'm', 'm7'],
['iii', 'm', 'm7'],
['IV', 'M', 'M7'],
['V', 'M', '7'],
['vi', 'm', 'm7'],
['vii', 'dim', 'm7b5'],
]
type_of_chord = chords.determine(chord, True, False, True)
for chord in type_of_chord:
name = chord[0]
# Get accidentals
a = 1
for n in chord[1:]:
if n == 'b':
name += 'b'
elif n == '#':
name += '#'
else:
break
a += 1
chord_type = chord[a:]
# Determine chord function
(interval_type, interval) = intervals.determine(key, name).split(' ')
if interval == 'unison':
func = 'I'
elif interval == 'second':
func = 'ii'
elif interval == 'third':
func = 'iii'
elif interval == 'fourth':
func = 'IV'
elif interval == 'fifth':
func = 'V'
elif interval == 'sixth':
func = 'vi'
elif interval == 'seventh':
func = 'vii'
# Check whether the chord is altered or not
for x in expected_chord:
if x[0] == func:
# Triads
if chord_type == x[1]:
if not shorthand:
func = func_dict[func]
elif chord_type == x[2]:
# Sevenths
if shorthand:
func += '7'
else:
func = func_dict[func] + ' seventh'
else:
# Other
if shorthand:
func += chord_type
else:
func = func_dict[func]\
+ chords.chord_shorthand_meaning[chord_type]
# Handle b's and #'s (for instance Dbm in key C is bII)
if shorthand:
if interval_type == 'minor':
func = 'b' + func
elif interval_type == 'augmented':
func = '#' + func
elif interval_type == 'diminished':
func = 'bb' + func
else:
if interval_type == 'minor':
func = 'minor ' + func
elif interval_type == 'augmented':
func = 'augmented ' + func
elif interval_type == 'diminished':
func = 'diminished ' + func
# Add to results
result.append(func)
return result | [
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] | Determine the harmonic function of chord in key.
This function can also deal with lists of chords.
Examples:
>>> determine(['C', 'E', 'G'], 'C')
['tonic']
>>> determine(['G', 'B', 'D'], 'C')
['dominant']
>>> determine(['G', 'B', 'D', 'F'], 'C', True)
['V7']
>>> determine([['C', 'E', 'G'], ['G', 'B', 'D']], 'C', True)
[['I'], ['V']] | [
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] | aa5a5d992d45ada61be0f9f86261380731bd7749 | https://github.com/bspaans/python-mingus/blob/aa5a5d992d45ada61be0f9f86261380731bd7749/mingus/core/progressions.py#L93-L206 | train | 236,298 |
bspaans/python-mingus | mingus/core/progressions.py | tuple_to_string | def tuple_to_string(prog_tuple):
"""Create a string from tuples returned by parse_string."""
(roman, acc, suff) = prog_tuple
if acc > 6:
acc = 0 - acc % 6
elif acc < -6:
acc = acc % 6
while acc < 0:
roman = 'b' + roman
acc += 1
while acc > 0:
roman = '#' + roman
acc -= 1
return roman + suff | python | def tuple_to_string(prog_tuple):
"""Create a string from tuples returned by parse_string."""
(roman, acc, suff) = prog_tuple
if acc > 6:
acc = 0 - acc % 6
elif acc < -6:
acc = acc % 6
while acc < 0:
roman = 'b' + roman
acc += 1
while acc > 0:
roman = '#' + roman
acc -= 1
return roman + suff | [
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] | aa5a5d992d45ada61be0f9f86261380731bd7749 | https://github.com/bspaans/python-mingus/blob/aa5a5d992d45ada61be0f9f86261380731bd7749/mingus/core/progressions.py#L234-L247 | train | 236,299 |
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