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import shutil
import gradio as gr
import numpy as np
from matplotlib import pyplot as plt
from mido import Message, MidiFile, MidiTrack
import os
import subprocess
from music21 import converter, note, interval
from pydub import AudioSegment
import hexachords
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
class HexachordApp:
def __init__(self):
self._hexachord = hexachords.Hexachord()
self._hexachord_base_sequence = None
self.ui = None
self.on_huggingface = "HUGGINGFACE_SPACE" in os.environ
def is_fsynth_installed(self):
""" Check to make sure fluidsynth exists in the PATH """
for path in os.environ['PATH'].split(os.pathsep):
f = os.path.join(path, 'fluidsynth')
if os.path.exists(f) and os.access(f, os.X_OK):
print('fluidsynth is installed')
return True
print('fluidsynth is NOT installed')
return False
def generate_chords(self, note_names, itvl):
# Placeholder for your actual chord generation function
# Assuming hexachord is a list of MIDI note numbers
interval_21 = 'P5'
if itvl == 'fourth':
interval_21 = 'P4'
self._hexachord_base_sequence = self._hexachord.generate_chord_sequence(note_names, intrvl=interval_21)
return self._hexachord_base_sequence
def generate_realizations(self):
# returns 3 triples of midipath, piano roll, audio player
reals = self._hexachord.generate_3_chords_realizations(self._hexachord_base_sequence)
midi_path1 = self.create_midi(reals[0], "real1.mid")
piano_roll_path1 = self.generate_piano_roll(reals[0], "real1.png")
audio_path1 = self.convert_midi_to_audio(midi_path1, "real1")
midi_path2 = self.create_midi(reals[1], "real2.mid")
piano_roll_path2 = self.generate_piano_roll(reals[1], "real2.png")
audio_path2 = self.convert_midi_to_audio(midi_path2, "real2")
midi_path3 = self.create_midi(reals[2], "real3.mid")
piano_roll_path3 = self.generate_piano_roll(reals[2], "real3.png")
audio_path3 = self.convert_midi_to_audio(midi_path3, "real3")
return midi_path1, piano_roll_path1, audio_path1, midi_path2, piano_roll_path2, audio_path2, midi_path3, piano_roll_path3, audio_path3
def create_midi(self, chords, file_name):
mid = MidiFile()
track = MidiTrack()
mid.tracks.append(track)
delta_time = 480 * 4
for i_chord, chord in enumerate(chords):
for i, note in enumerate(chord):
if i == 0 and i_chord != 0:
track.append(Message('note_on', note=note.pitch.midi, velocity=64, time=1))
else:
track.append(Message('note_on', note=note.pitch.midi, velocity=64, time=0))
for i, note in enumerate(chord):
if i==0:
track.append(Message('note_off', note=note.pitch.midi, velocity=0, time=delta_time - 1))
else:
track.append(Message('note_off', note=note.pitch.midi, velocity=0, time=0))
midi_path = os.path.join(BASE_DIR, file_name)
mid.save(midi_path)
return midi_path
def convert_midi_to_audio(self, midi_path, file_name):
if not shutil.which("fluidsynth"):
try:
subprocess.run(["apt-get", "update"], check=True)
subprocess.run(["apt-get", "install", "-y", "fluidsynth"], check=True)
except Exception as e:
return f"Error installing Fluidsynth: {str(e)}"
wav_path = os.path.join(BASE_DIR, file_name + ".wav")
mp3_path = os.path.join(BASE_DIR, file_name + ".mp3")
soundfont_path = os.path.join(BASE_DIR, "soundfont.sf2")
if not os.path.exists(soundfont_path):
return "Error: SoundFont file not found. Please provide a valid .sf2 file."
try:
subprocess.run(["fluidsynth", "-ni", soundfont_path, midi_path, "-F", wav_path, "-r", "44100"], check=True)
AudioSegment.converter = "ffmpeg"
audio = AudioSegment.from_wav(wav_path)
audio.export(mp3_path, format="mp3")
return mp3_path
except Exception as e:
return f"Error converting MIDI to audio: {str(e)}"
def generate_png(self, midi_file, output_file_name):
return self._hexachord.midi_to_svg_file(midi_file, output_file_name)
def generate_piano_roll(self, chords, label):
fig, ax = plt.subplots(figsize=(8, 4))
for i, chord in enumerate(chords):
for note in chord:
ax.broken_barh([(i * 1, 0.8)], (note.pitch.midi - 0.4, 0.8), facecolors='blue')
ax.set_xlabel("Chord Progression")
ax.set_ylabel("MIDI Note Number")
min_min_chords = 128
max_max_chords = 0
for ch in chords:
for note in ch:
if note.pitch.midi < min_min_chords:
min_min_chords = note.pitch.midi
if note.pitch.midi > max_max_chords:
max_max_chords = note.pitch.midi
ax.set_yticks(range(min_min_chords, max_max_chords + 1, 2))
ax.set_xticks(range(len(chords)))
ax.set_xticklabels([f"Chord {i + 1}" for i in range(len(chords))])
plt.grid(True, linestyle='--', alpha=0.5)
plt.savefig(label)
return label
def launch_score_editor(self, midi_path):
try:
score = converter.parse(midi_path)
score.show('musicxml')
return "Opened MIDI file in the default score editor!"
except Exception as e:
return f"Error opening score editor: {str(e)}"
def process_hexachord(self, hexachord_str, itvl):
try:
notes = [note.Note(n) for n in hexachord_str.split()]
if len(notes) != 6 or len(set(notes)) != 6:
return "Please enter exactly 6 unique MIDI note numbers."
except ValueError:
return "Invalid input. Enter 6 MIDI note numbers separated by spaces."
chords = self.generate_chords(notes, itvl)
midi_path = self.create_midi(chords, "../base_chords.mid")
#piano_roll_path = self.generate_piano_roll(chords, "base_chords.png")
score_path = self.generate_png (midi_path, "score_base_chords.png")
audio_path = self.convert_midi_to_audio(midi_path, "base_chords")
# return midi_path, piano_roll_path, audio_path
return midi_path, score_path, audio_path
def render(self):
with gr.Blocks() as ui:
gr.Markdown("# Hexachord-based Chord Generator")
with gr.Tabs():
with gr.TabItem("Hexachord Generator"):
with gr.Row():
hexachord_selector = gr.Dropdown(label="Select Known Hexachord",
choices=self.get_known_hexachords_choice(), value=None, interactive=True)
hexachord_input = gr.Textbox(
label="Enter 6 notes (pitchclass plus octave, separated by spaces)",
value="C3 D3 E3 G3 A3 B3",
interactive = True
)
interval_switch = gr.Radio(
choices=["fourth", "fifth"],
label="Select Interval",
value="fifth"
)
generate_button = gr.Button("Generate Chords")
midi_output = gr.File(label="Download MIDI File")
# piano_roll_output = gr.Image(label="Piano Roll Visualization")
score_output = gr.Image(label="Score Visualization")
audio_output = gr.Audio(label="Play Generated Chords", value=None, interactive=False)
hexachord_selector.change(
fn=self.get_selected_hexachord,
inputs=[hexachord_selector],
outputs=[hexachord_input]
)
# generate_button.click(
# fn=self.process_hexachord,
# inputs=[hexachord_selector, interval_switch],
# outputs=[midi_output, score_output, audio_output]
# )
generate_button.click(
fn=self.process_hexachord,
inputs=[hexachord_input, interval_switch],
# outputs=[midi_output, piano_roll_output, audio_output]
outputs = [midi_output, score_output, audio_output]
)
# Pressing Enter in the textbox also triggers processing
hexachord_input.submit(
fn=self.process_hexachord,
inputs=[hexachord_input, interval_switch],
outputs=[midi_output, score_output, audio_output]
)
with gr.TabItem("Alternative Chord Realizations"):
gr.Markdown("Alternative Chord Realizations")
realization_button = gr.Button("Generate Alternative Realizations")
realization_outputs = []
for i in range(3): # Three alternative realizations
with gr.Group():
gr.Markdown(f"#### Realization {i + 1}")
midi_output = gr.File(label="Download MIDI File")
piano_roll = gr.Image(label=f"Piano Roll {i + 1}")
audio_player = gr.Audio(label=f"Play Chords {i + 1}", interactive=False)
realization_outputs.append((midi_output, piano_roll, audio_player))
# Clicking the button triggers realization generation
realization_button.click(
fn=self.generate_realizations,
inputs=[],
outputs=[output for trip in realization_outputs for output in trip]
)
with gr.TabItem("Settings"):
gr.Markdown("### Configuration Options")
setting_1 = gr.Checkbox(label="Enable Advanced Mode")
setting_2 = gr.Slider(0, 100, label="Complexity Level")
self.ui = ui
def get_known_hexachords_choice(self):
return self._hexachord.known_hexachords
def get_selected_hexachord(self, x):
# lambda x: {"Hexachord 1": "C3 D3 E3 G3 A3 B3", "Hexachord 2": "D3 E3 F3 A3 B3 C4",
# "Hexachord 3": "E3 G3 A3 C4 D4 F4"}.get(x, "")
item = x[x.index('['):x.index(']')+1]
int_array = np.array(ast.literal_eval(item))
hexa_string = ''
start_note = note.Note('C3')
for i in int_array:
add_note = start_note.transpose(int(i))
hexa_string = hexa_string + ' ' + add_note.nameWithOctave
return hexa_string
def launch_app():
hex = HexachordApp()
hex.is_fsynth_installed()
hex.render()
if hex.on_huggingface:
hex.ui.launch(server_name="0.0.0.0", server_port=7860)
else:
hex.ui.launch()
launch_app()
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