Add files using upload-large-folder tool

.gitattributes

@@ -1,59 +1,4 @@
-*.7z filter=lfs diff=lfs merge=lfs -text
-*.arrow filter=lfs diff=lfs merge=lfs -text
-*.bin filter=lfs diff=lfs merge=lfs -text
-*.bz2 filter=lfs diff=lfs merge=lfs -text
-*.ckpt filter=lfs diff=lfs merge=lfs -text
-*.ftz filter=lfs diff=lfs merge=lfs -text
-*.gz filter=lfs diff=lfs merge=lfs -text
-*.h5 filter=lfs diff=lfs merge=lfs -text
-*.joblib filter=lfs diff=lfs merge=lfs -text
-*.lfs.* filter=lfs diff=lfs merge=lfs -text
-*.lz4 filter=lfs diff=lfs merge=lfs -text
-*.mds filter=lfs diff=lfs merge=lfs -text
-*.mlmodel filter=lfs diff=lfs merge=lfs -text
-*.model filter=lfs diff=lfs merge=lfs -text
-*.msgpack filter=lfs diff=lfs merge=lfs -text
-*.npy filter=lfs diff=lfs merge=lfs -text
-*.npz filter=lfs diff=lfs merge=lfs -text
-*.onnx filter=lfs diff=lfs merge=lfs -text
-*.ot filter=lfs diff=lfs merge=lfs -text
-*.parquet filter=lfs diff=lfs merge=lfs -text
-*.pb filter=lfs diff=lfs merge=lfs -text
-*.pickle filter=lfs diff=lfs merge=lfs -text
-*.pkl filter=lfs diff=lfs merge=lfs -text
-*.pt filter=lfs diff=lfs merge=lfs -text
-*.pth filter=lfs diff=lfs merge=lfs -text
-*.rar filter=lfs diff=lfs merge=lfs -text
-*.safetensors filter=lfs diff=lfs merge=lfs -text
-saved_model/**/* filter=lfs diff=lfs merge=lfs -text
-*.tar.* filter=lfs diff=lfs merge=lfs -text
-*.tar filter=lfs diff=lfs merge=lfs -text
-*.tflite filter=lfs diff=lfs merge=lfs -text
-*.tgz filter=lfs diff=lfs merge=lfs -text
-*.wasm filter=lfs diff=lfs merge=lfs -text
-*.xz filter=lfs diff=lfs merge=lfs -text
-*.zip filter=lfs diff=lfs merge=lfs -text
-*.zst filter=lfs diff=lfs merge=lfs -text
-*tfevents* filter=lfs diff=lfs merge=lfs -text
-# Audio files - uncompressed
-*.pcm filter=lfs diff=lfs merge=lfs -text
-*.sam filter=lfs diff=lfs merge=lfs -text
-*.raw filter=lfs diff=lfs merge=lfs -text
-# Audio files - compressed
-*.aac filter=lfs diff=lfs merge=lfs -text
-*.flac filter=lfs diff=lfs merge=lfs -text
-*.mp3 filter=lfs diff=lfs merge=lfs -text
-*.ogg filter=lfs diff=lfs merge=lfs -text
 *.wav filter=lfs diff=lfs merge=lfs -text
-# Image files - uncompressed
-*.bmp filter=lfs diff=lfs merge=lfs -text
-*.gif filter=lfs diff=lfs merge=lfs -text
-*.png filter=lfs diff=lfs merge=lfs -text
-*.tiff filter=lfs diff=lfs merge=lfs -text
-# Image files - compressed
-*.jpg filter=lfs diff=lfs merge=lfs -text
-*.jpeg filter=lfs diff=lfs merge=lfs -text
-*.webp filter=lfs diff=lfs merge=lfs -text
-# Video files - compressed
-*.mp4 filter=lfs diff=lfs merge=lfs -text
-*.webm filter=lfs diff=lfs merge=lfs -text
+*.csv text eol=lf
+*.md  text eol=lf
+*.json text eol=lf

README.md

@@ -0,0 +1,71 @@
+    ---
+    license: cc-by-4.0
+    task_categories:
+      - audio-classification
+      - automatic-speech-recognition
+    tags:
+      - speech-commands
+      - keyword-spotting
+      - audio
+    configs:
+      - config_name: default
+        data_files:
+          - split: train
+            path: data/train/**
+          - split: validation
+            path: data/validation/**
+          - split: test
+            path: data/test/**
+    ---
+
+    # Speech Commands (v0.02)
+
+    One-second WAV clips of spoken words and background noise, organised by
+    split and label in the Hugging Face **audiofolder** convention.
+
+    ## Quick start
+
+    ```python
+    from datasets import load_dataset
+
+    ds = load_dataset("odunola/speech-commands")
+    print(ds)
+    ```
+
+    ## Structure
+
+    ```
+    data/
+      <split>/
+        metadata.csv        # file_name, label, is_unknown, speaker_id, utterance_id
+        <label>/*.wav
+    ```
+
+    ## Labels (36)
+
+    `_silence_`, `backward`, `bed`, `bird`, `cat`, `dog`, `down`, `eight`, `five`, `follow`, `forward`, `four`, `go`, `happy`, `house`, `learn`, `left`, `marvin`, `nine`, `no`, `off`, `on`, `one`, `right`, `seven`, `sheila`, `six`, `stop`, `three`, `tree`, `two`, `up`, `visual`, `wow`, `yes`, `zero`
+
+    ## Source
+
+    - Homepage: https://www.tensorflow.org/datasets/catalog/speech_commands
+    - License: Creative Commons BY 4.0 License
+
+    ## Citation
+
+    ```bibtex
+    @article{speechcommandsv2,
+   author  = {{Warden}, P.},
+   title   = "{Speech Commands: A Dataset for Limited-Vocabulary Speech Recognition}",
+   journal = {ArXiv e-prints},
+   archivePrefix = "arXiv",
+   eprint  = {1804.03209},
+   primaryClass = "cs.CL",
+   year    = 2018,
+   month   = apr,
+   url     = {https://arxiv.org/abs/1804.03209},
+}
+    ```
+
+    ## Description
+
+    A set of one-second .wav audio files, each containing a single spoken English word or background noise. These words are from a small set of commands, spoken by a variety of different speakers. Version 0.02 adds the words: backward, forward, follow, learn, visual.

data/test/LICENSE

@@ -0,0 +1,395 @@
+Attribution 4.0 International
+
+=======================================================================
+
+Creative Commons Corporation ("Creative Commons") is not a law firm and
+does not provide legal services or legal advice. Distribution of
+Creative Commons public licenses does not create a lawyer-client or
+other relationship. Creative Commons makes its licenses and related
+information available on an "as-is" basis. Creative Commons gives no
+warranties regarding its licenses, any material licensed under their
+terms and conditions, or any related information. Creative Commons
+disclaims all liability for damages resulting from their use to the
+fullest extent possible.
+
+Using Creative Commons Public Licenses
+
+Creative Commons public licenses provide a standard set of terms and
+conditions that creators and other rights holders may use to share
+original works of authorship and other material subject to copyright
+and certain other rights specified in the public license below. The
+following considerations are for informational purposes only, are not
+exhaustive, and do not form part of our licenses.
+
+     Considerations for licensors: Our public licenses are
+     intended for use by those authorized to give the public
+     permission to use material in ways otherwise restricted by
+     copyright and certain other rights. Our licenses are
+     irrevocable. Licensors should read and understand the terms
+     and conditions of the license they choose before applying it.
+     Licensors should also secure all rights necessary before
+     applying our licenses so that the public can reuse the
+     material as expected. Licensors should clearly mark any
+     material not subject to the license. This includes other CC-
+     licensed material, or material used under an exception or
+     limitation to copyright. More considerations for licensors:
+	wiki.creativecommons.org/Considerations_for_licensors
+
+     Considerations for the public: By using one of our public
+     licenses, a licensor grants the public permission to use the
+     licensed material under specified terms and conditions. If
+     the licensor's permission is not necessary for any reason--for
+     example, because of any applicable exception or limitation to
+     copyright--then that use is not regulated by the license. Our
+     licenses grant only permissions under copyright and certain
+     other rights that a licensor has authority to grant. Use of
+     the licensed material may still be restricted for other
+     reasons, including because others have copyright or other
+     rights in the material. A licensor may make special requests,
+     such as asking that all changes be marked or described.
+     Although not required by our licenses, you are encouraged to
+     respect those requests where reasonable. More_considerations
+     for the public: 
+	wiki.creativecommons.org/Considerations_for_licensees
+
+=======================================================================
+
+Creative Commons Attribution 4.0 International Public License
+
+By exercising the Licensed Rights (defined below), You accept and agree
+to be bound by the terms and conditions of this Creative Commons
+Attribution 4.0 International Public License ("Public License"). To the
+extent this Public License may be interpreted as a contract, You are
+granted the Licensed Rights in consideration of Your acceptance of
+these terms and conditions, and the Licensor grants You such rights in
+consideration of benefits the Licensor receives from making the
+Licensed Material available under these terms and conditions.
+
+
+Section 1 -- Definitions.
+
+  a. Adapted Material means material subject to Copyright and Similar
+     Rights that is derived from or based upon the Licensed Material
+     and in which the Licensed Material is translated, altered,
+     arranged, transformed, or otherwise modified in a manner requiring
+     permission under the Copyright and Similar Rights held by the
+     Licensor. For purposes of this Public License, where the Licensed
+     Material is a musical work, performance, or sound recording,
+     Adapted Material is always produced where the Licensed Material is
+     synched in timed relation with a moving image.
+
+  b. Adapter's License means the license You apply to Your Copyright
+     and Similar Rights in Your contributions to Adapted Material in
+     accordance with the terms and conditions of this Public License.
+
+  c. Copyright and Similar Rights means copyright and/or similar rights
+     closely related to copyright including, without limitation,
+     performance, broadcast, sound recording, and Sui Generis Database
+     Rights, without regard to how the rights are labeled or
+     categorized. For purposes of this Public License, the rights
+     specified in Section 2(b)(1)-(2) are not Copyright and Similar
+     Rights.
+
+  d. Effective Technological Measures means those measures that, in the
+     absence of proper authority, may not be circumvented under laws
+     fulfilling obligations under Article 11 of the WIPO Copyright
+     Treaty adopted on December 20, 1996, and/or similar international
+     agreements.
+
+  e. Exceptions and Limitations means fair use, fair dealing, and/or
+     any other exception or limitation to Copyright and Similar Rights
+     that applies to Your use of the Licensed Material.
+
+  f. Licensed Material means the artistic or literary work, database,
+     or other material to which the Licensor applied this Public
+     License.
+
+  g. Licensed Rights means the rights granted to You subject to the
+     terms and conditions of this Public License, which are limited to
+     all Copyright and Similar Rights that apply to Your use of the
+     Licensed Material and that the Licensor has authority to license.
+
+  h. Licensor means the individual(s) or entity(ies) granting rights
+     under this Public License.
+
+  i. Share means to provide material to the public by any means or
+     process that requires permission under the Licensed Rights, such
+     as reproduction, public display, public performance, distribution,
+     dissemination, communication, or importation, and to make material
+     available to the public including in ways that members of the
+     public may access the material from a place and at a time
+     individually chosen by them.
+
+  j. Sui Generis Database Rights means rights other than copyright
+     resulting from Directive 96/9/EC of the European Parliament and of
+     the Council of 11 March 1996 on the legal protection of databases,
+     as amended and/or succeeded, as well as other essentially
+     equivalent rights anywhere in the world.
+
+  k. You means the individual or entity exercising the Licensed Rights
+     under this Public License. Your has a corresponding meaning.
+
+
+Section 2 -- Scope.
+
+  a. License grant.
+
+       1. Subject to the terms and conditions of this Public License,
+          the Licensor hereby grants You a worldwide, royalty-free,
+          non-sublicensable, non-exclusive, irrevocable license to
+          exercise the Licensed Rights in the Licensed Material to:
+
+            a. reproduce and Share the Licensed Material, in whole or
+               in part; and
+
+            b. produce, reproduce, and Share Adapted Material.
+
+       2. Exceptions and Limitations. For the avoidance of doubt, where
+          Exceptions and Limitations apply to Your use, this Public
+          License does not apply, and You do not need to comply with
+          its terms and conditions.
+
+       3. Term. The term of this Public License is specified in Section
+          6(a).
+
+       4. Media and formats; technical modifications allowed. The
+          Licensor authorizes You to exercise the Licensed Rights in
+          all media and formats whether now known or hereafter created,
+          and to make technical modifications necessary to do so. The
+          Licensor waives and/or agrees not to assert any right or
+          authority to forbid You from making technical modifications
+          necessary to exercise the Licensed Rights, including
+          technical modifications necessary to circumvent Effective
+          Technological Measures. For purposes of this Public License,
+          simply making modifications authorized by this Section 2(a)
+          (4) never produces Adapted Material.
+
+       5. Downstream recipients.
+
+            a. Offer from the Licensor -- Licensed Material. Every
+               recipient of the Licensed Material automatically
+               receives an offer from the Licensor to exercise the
+               Licensed Rights under the terms and conditions of this
+               Public License.
+
+            b. No downstream restrictions. You may not offer or impose
+               any additional or different terms or conditions on, or
+               apply any Effective Technological Measures to, the
+               Licensed Material if doing so restricts exercise of the
+               Licensed Rights by any recipient of the Licensed
+               Material.
+
+       6. No endorsement. Nothing in this Public License constitutes or
+          may be construed as permission to assert or imply that You
+          are, or that Your use of the Licensed Material is, connected
+          with, or sponsored, endorsed, or granted official status by,
+          the Licensor or others designated to receive attribution as
+          provided in Section 3(a)(1)(A)(i).
+
+  b. Other rights.
+
+       1. Moral rights, such as the right of integrity, are not
+          licensed under this Public License, nor are publicity,
+          privacy, and/or other similar personality rights; however, to
+          the extent possible, the Licensor waives and/or agrees not to
+          assert any such rights held by the Licensor to the limited
+          extent necessary to allow You to exercise the Licensed
+          Rights, but not otherwise.
+
+       2. Patent and trademark rights are not licensed under this
+          Public License.
+
+       3. To the extent possible, the Licensor waives any right to
+          collect royalties from You for the exercise of the Licensed
+          Rights, whether directly or through a collecting society
+          under any voluntary or waivable statutory or compulsory
+          licensing scheme. In all other cases the Licensor expressly
+          reserves any right to collect such royalties.
+
+
+Section 3 -- License Conditions.
+
+Your exercise of the Licensed Rights is expressly made subject to the
+following conditions.
+
+  a. Attribution.
+
+       1. If You Share the Licensed Material (including in modified
+          form), You must:
+
+            a. retain the following if it is supplied by the Licensor
+               with the Licensed Material:
+
+                 i. identification of the creator(s) of the Licensed
+                    Material and any others designated to receive
+                    attribution, in any reasonable manner requested by
+                    the Licensor (including by pseudonym if
+                    designated);
+
+                ii. a copyright notice;
+
+               iii. a notice that refers to this Public License;
+
+                iv. a notice that refers to the disclaimer of
+                    warranties;
+
+                 v. a URI or hyperlink to the Licensed Material to the
+                    extent reasonably practicable;
+
+            b. indicate if You modified the Licensed Material and
+               retain an indication of any previous modifications; and
+
+            c. indicate the Licensed Material is licensed under this
+               Public License, and include the text of, or the URI or
+               hyperlink to, this Public License.
+
+       2. You may satisfy the conditions in Section 3(a)(1) in any
+          reasonable manner based on the medium, means, and context in
+          which You Share the Licensed Material. For example, it may be
+          reasonable to satisfy the conditions by providing a URI or
+          hyperlink to a resource that includes the required
+          information.
+
+       3. If requested by the Licensor, You must remove any of the
+          information required by Section 3(a)(1)(A) to the extent
+          reasonably practicable.
+
+       4. If You Share Adapted Material You produce, the Adapter's
+          License You apply must not prevent recipients of the Adapted
+          Material from complying with this Public License.
+
+
+Section 4 -- Sui Generis Database Rights.
+
+Where the Licensed Rights include Sui Generis Database Rights that
+apply to Your use of the Licensed Material:
+
+  a. for the avoidance of doubt, Section 2(a)(1) grants You the right
+     to extract, reuse, reproduce, and Share all or a substantial
+     portion of the contents of the database;
+
+  b. if You include all or a substantial portion of the database
+     contents in a database in which You have Sui Generis Database
+     Rights, then the database in which You have Sui Generis Database
+     Rights (but not its individual contents) is Adapted Material; and
+
+  c. You must comply with the conditions in Section 3(a) if You Share
+     all or a substantial portion of the contents of the database.
+
+For the avoidance of doubt, this Section 4 supplements and does not
+replace Your obligations under this Public License where the Licensed
+Rights include other Copyright and Similar Rights.
+
+
+Section 5 -- Disclaimer of Warranties and Limitation of Liability.
+
+  a. UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE
+     EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
+     AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF
+     ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS,
+     IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION,
+     WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR
+     PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS,
+     ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT
+     KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT
+     ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.
+
+  b. TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE
+     TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION,
+     NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT,
+     INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES,
+     COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR
+     USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN
+     ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR
+     DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR
+     IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.
+
+  c. The disclaimer of warranties and limitation of liability provided
+     above shall be interpreted in a manner that, to the extent
+     possible, most closely approximates an absolute disclaimer and
+     waiver of all liability.
+
+
+Section 6 -- Term and Termination.
+
+  a. This Public License applies for the term of the Copyright and
+     Similar Rights licensed here. However, if You fail to comply with
+     this Public License, then Your rights under this Public License
+     terminate automatically.
+
+  b. Where Your right to use the Licensed Material has terminated under
+     Section 6(a), it reinstates:
+
+       1. automatically as of the date the violation is cured, provided
+          it is cured within 30 days of Your discovery of the
+          violation; or
+
+       2. upon express reinstatement by the Licensor.
+
+     For the avoidance of doubt, this Section 6(b) does not affect any
+     right the Licensor may have to seek remedies for Your violations
+     of this Public License.
+
+  c. For the avoidance of doubt, the Licensor may also offer the
+     Licensed Material under separate terms or conditions or stop
+     distributing the Licensed Material at any time; however, doing so
+     will not terminate this Public License.
+
+  d. Sections 1, 5, 6, 7, and 8 survive termination of this Public
+     License.
+
+
+Section 7 -- Other Terms and Conditions.
+
+  a. The Licensor shall not be bound by any additional or different
+     terms or conditions communicated by You unless expressly agreed.
+
+  b. Any arrangements, understandings, or agreements regarding the
+     Licensed Material not stated herein are separate from and
+     independent of the terms and conditions of this Public License.
+
+
+Section 8 -- Interpretation.
+
+  a. For the avoidance of doubt, this Public License does not, and
+     shall not be interpreted to, reduce, limit, restrict, or impose
+     conditions on any use of the Licensed Material that could lawfully
+     be made without permission under this Public License.
+
+  b. To the extent possible, if any provision of this Public License is
+     deemed unenforceable, it shall be automatically reformed to the
+     minimum extent necessary to make it enforceable. If the provision
+     cannot be reformed, it shall be severed from this Public License
+     without affecting the enforceability of the remaining terms and
+     conditions.
+
+  c. No term or condition of this Public License will be waived and no
+     failure to comply consented to unless expressly agreed to by the
+     Licensor.
+
+  d. Nothing in this Public License constitutes or may be interpreted
+     as a limitation upon, or waiver of, any privileges and immunities
+     that apply to the Licensor or You, including from the legal
+     processes of any jurisdiction or authority.
+
+
+=======================================================================
+
+Creative Commons is not a party to its public
+licenses. Notwithstanding, Creative Commons may elect to apply one of
+its public licenses to material it publishes and in those instances
+will be considered the “Licensor.” The text of the Creative Commons
+public licenses is dedicated to the public domain under the CC0 Public
+Domain Dedication. Except for the limited purpose of indicating that
+material is shared under a Creative Commons public license or as
+otherwise permitted by the Creative Commons policies published at
+creativecommons.org/policies, Creative Commons does not authorize the
+use of the trademark "Creative Commons" or any other trademark or logo
+of Creative Commons without its prior written consent including,
+without limitation, in connection with any unauthorized modifications
+to any of its public licenses or any other arrangements,
+understandings, or agreements concerning use of licensed material. For
+the avoidance of doubt, this paragraph does not form part of the
+public licenses.
+
+Creative Commons may be contacted at creativecommons.org.

data/test/README.md

@@ -0,0 +1,166 @@
+# Speech Commands Data Set v0.02
+
+This is a set of one-second .wav audio files, each containing a single spoken
+English word. These words are from a small set of commands, and are spoken by a
+variety of different speakers. The audio files are organized into folders based
+on the word they contain, and this data set is designed to help train simple
+machine learning models. This dataset is covered in more detail at [https://arxiv.org/abs/1804.03209](https://arxiv.org/abs/1804.03209).
+
+It's licensed under the [Creative Commons BY 4.0
+license](https://creativecommons.org/licenses/by/4.0/). See the LICENSE
+file in this folder for full details. Its original location was at
+[http://download.tensorflow.org/data/speech_commands_v0.02.tar.gz](http://download.tensorflow.org/data/speech_commands_v0.02.tar.gz).
+
+## History
+
+Version 0.01 of the data set was released on August 3rd 2017 and contained
+64,727 audio files.
+
+This is version 0.02 of the data set containing 105,829 audio files, released on
+April 11th 2018.
+
+## Collection
+
+The audio files were collected using crowdsourcing, see
+[aiyprojects.withgoogle.com/open_speech_recording](https://github.com/petewarden/extract_loudest_section)
+for some of the open source audio collection code we used (and please consider
+contributing to enlarge this data set). The goal was to gather examples of
+people speaking single-word commands, rather than conversational sentences, so
+they were prompted for individual words over the course of a five minute
+session. Twenty core command words were recorded, with most speakers saying each
+of them five times. The core words are "Yes", "No", "Up", "Down", "Left",
+"Right", "On", "Off", "Stop", "Go", "Zero", "One", "Two", "Three", "Four",
+"Five", "Six", "Seven", "Eight", and "Nine". To help distinguish unrecognized
+words, there are also ten auxiliary words, which most speakers only said once.
+These include "Bed", "Bird", "Cat", "Dog", "Happy", "House", "Marvin", "Sheila",
+"Tree", and "Wow".
+
+## Organization
+
+The files are organized into folders, with each directory name labelling the
+word that is spoken in all the contained audio files. No details were kept of
+any of the participants age, gender, or location, and random ids were assigned
+to each individual. These ids are stable though, and encoded in each file name
+as the first part before the underscore. If a participant contributed multiple
+utterances of the same word, these are distinguished by the number at the end of
+the file name. For example, the file path `happy/3cfc6b3a_nohash_2.wav`
+indicates that the word spoken was "happy", the speaker's id was "3cfc6b3a", and
+this is the third utterance of that word by this speaker in the data set. The
+'nohash' section is to ensure that all the utterances by a single speaker are
+sorted into the same training partition, to keep very similar repetitions from
+giving unrealistically optimistic evaluation scores.
+
+## Partitioning
+
+The audio clips haven't been separated into training, test, and validation sets
+explicitly, but by convention a hashing function is used to stably assign each
+file to a set. Here's some Python code demonstrating how a complete file path
+and the desired validation and test set sizes (usually both 10%) are used to
+assign a set:
+
+```python
+MAX_NUM_WAVS_PER_CLASS = 2**27 - 1  # ~134M
+
+def which_set(filename, validation_percentage, testing_percentage):
+  """Determines which data partition the file should belong to.
+
+  We want to keep files in the same training, validation, or testing sets even
+  if new ones are added over time. This makes it less likely that testing
+  samples will accidentally be reused in training when long runs are restarted
+  for example. To keep this stability, a hash of the filename is taken and used
+  to determine which set it should belong to. This determination only depends on
+  the name and the set proportions, so it won't change as other files are added.
+
+  It's also useful to associate particular files as related (for example words
+  spoken by the same person), so anything after '_nohash_' in a filename is
+  ignored for set determination. This ensures that 'bobby_nohash_0.wav' and
+  'bobby_nohash_1.wav' are always in the same set, for example.
+
+  Args:
+    filename: File path of the data sample.
+    validation_percentage: How much of the data set to use for validation.
+    testing_percentage: How much of the data set to use for testing.
+
+  Returns:
+    String, one of 'training', 'validation', or 'testing'.
+  """
+  base_name = os.path.basename(filename)
+  # We want to ignore anything after '_nohash_' in the file name when
+  # deciding which set to put a wav in, so the data set creator has a way of
+  # grouping wavs that are close variations of each other.
+  hash_name = re.sub(r'_nohash_.*$', '', base_name)
+  # This looks a bit magical, but we need to decide whether this file should
+  # go into the training, testing, or validation sets, and we want to keep
+  # existing files in the same set even if more files are subsequently
+  # added.
+  # To do that, we need a stable way of deciding based on just the file name
+  # itself, so we do a hash of that and then use that to generate a
+  # probability value that we use to assign it.
+  hash_name_hashed = hashlib.sha1(hash_name).hexdigest()
+  percentage_hash = ((int(hash_name_hashed, 16) %
+                      (MAX_NUM_WAVS_PER_CLASS + 1)) *
+                     (100.0 / MAX_NUM_WAVS_PER_CLASS))
+  if percentage_hash < validation_percentage:
+    result = 'validation'
+  elif percentage_hash < (testing_percentage + validation_percentage):
+    result = 'testing'
+  else:
+    result = 'training'
+  return result
+```
+
+The results of running this over the current set are included in this archive as
+validation_list.txt and testing_list.txt. These text files contain the paths to
+all the files in each set, with each path on a new line. Any files that aren't
+in either of these lists can be considered to be part of the training set.
+
+## Processing
+
+The original audio files were collected in uncontrolled locations by people
+around the world. We requested that they do the recording in a closed room for
+privacy reasons, but didn't stipulate any quality requirements. This was by
+design, since we wanted examples of the sort of speech data that we're likely to
+encounter in consumer and robotics applications, where we don't have much
+control over the recording equipment or environment. The data was captured in a
+variety of formats, for example Ogg Vorbis encoding for the web app, and then
+converted to a 16-bit little-endian PCM-encoded WAVE file at a 16000 sample
+rate. The audio was then trimmed to a one second length to align most
+utterances, using the
+[extract_loudest_section](https://github.com/petewarden/extract_loudest_section)
+tool. The audio files were then screened for silence or incorrect words, and
+arranged into folders by label.
+
+## Background Noise
+
+To help train networks to cope with noisy environments, it can be helpful to mix
+in realistic background audio. The `_silence_` folder contains a set of
+longer audio clips that are either recordings or mathematical simulations of
+noise. 
+
+## Citations
+
+If you use the Speech Commands dataset in your work, please cite it as:
+
+```
+@article{speechcommandsv2,
+   author = {{Warden}, P.},
+    title = "{Speech Commands: A Dataset for Limited-Vocabulary Speech Recognition}",
+  journal = {ArXiv e-prints},
+archivePrefix = "arXiv",
+   eprint = {1804.03209},
+ primaryClass = "cs.CL",
+ keywords = {Computer Science - Computation and Language, Computer Science - Human-Computer Interaction},
+     year = 2018,
+    month = apr,
+    url = {https://arxiv.org/abs/1804.03209},
+}
+```
+
+## Credits
+
+Massive thanks are due to everyone who donated recordings to this data set, I'm
+very grateful. I also couldn't have put this together without the help and
+support of Billy Rutledge, Rajat Monga, Raziel Alvarez, Brad Krueger, Barbara
+Petit, Gursheesh Kour, and all the AIY and TensorFlow teams.
+
+Pete Warden, petewarden@google.com

data/train/LICENSE

@@ -0,0 +1,395 @@
+Attribution 4.0 International
+
+=======================================================================
+
+Creative Commons Corporation ("Creative Commons") is not a law firm and
+does not provide legal services or legal advice. Distribution of
+Creative Commons public licenses does not create a lawyer-client or
+other relationship. Creative Commons makes its licenses and related
+information available on an "as-is" basis. Creative Commons gives no
+warranties regarding its licenses, any material licensed under their
+terms and conditions, or any related information. Creative Commons
+disclaims all liability for damages resulting from their use to the
+fullest extent possible.
+
+Using Creative Commons Public Licenses
+
+Creative Commons public licenses provide a standard set of terms and
+conditions that creators and other rights holders may use to share
+original works of authorship and other material subject to copyright
+and certain other rights specified in the public license below. The
+following considerations are for informational purposes only, are not
+exhaustive, and do not form part of our licenses.
+
+     Considerations for licensors: Our public licenses are
+     intended for use by those authorized to give the public
+     permission to use material in ways otherwise restricted by
+     copyright and certain other rights. Our licenses are
+     irrevocable. Licensors should read and understand the terms
+     and conditions of the license they choose before applying it.
+     Licensors should also secure all rights necessary before
+     applying our licenses so that the public can reuse the
+     material as expected. Licensors should clearly mark any
+     material not subject to the license. This includes other CC-
+     licensed material, or material used under an exception or
+     limitation to copyright. More considerations for licensors:
+	wiki.creativecommons.org/Considerations_for_licensors
+
+     Considerations for the public: By using one of our public
+     licenses, a licensor grants the public permission to use the
+     licensed material under specified terms and conditions. If
+     the licensor's permission is not necessary for any reason--for
+     example, because of any applicable exception or limitation to
+     copyright--then that use is not regulated by the license. Our
+     licenses grant only permissions under copyright and certain
+     other rights that a licensor has authority to grant. Use of
+     the licensed material may still be restricted for other
+     reasons, including because others have copyright or other
+     rights in the material. A licensor may make special requests,
+     such as asking that all changes be marked or described.
+     Although not required by our licenses, you are encouraged to
+     respect those requests where reasonable. More_considerations
+     for the public: 
+	wiki.creativecommons.org/Considerations_for_licensees
+
+=======================================================================
+
+Creative Commons Attribution 4.0 International Public License
+
+By exercising the Licensed Rights (defined below), You accept and agree
+to be bound by the terms and conditions of this Creative Commons
+Attribution 4.0 International Public License ("Public License"). To the
+extent this Public License may be interpreted as a contract, You are
+granted the Licensed Rights in consideration of Your acceptance of
+these terms and conditions, and the Licensor grants You such rights in
+consideration of benefits the Licensor receives from making the
+Licensed Material available under these terms and conditions.
+
+
+Section 1 -- Definitions.
+
+  a. Adapted Material means material subject to Copyright and Similar
+     Rights that is derived from or based upon the Licensed Material
+     and in which the Licensed Material is translated, altered,
+     arranged, transformed, or otherwise modified in a manner requiring
+     permission under the Copyright and Similar Rights held by the
+     Licensor. For purposes of this Public License, where the Licensed
+     Material is a musical work, performance, or sound recording,
+     Adapted Material is always produced where the Licensed Material is
+     synched in timed relation with a moving image.
+
+  b. Adapter's License means the license You apply to Your Copyright
+     and Similar Rights in Your contributions to Adapted Material in
+     accordance with the terms and conditions of this Public License.
+
+  c. Copyright and Similar Rights means copyright and/or similar rights
+     closely related to copyright including, without limitation,
+     performance, broadcast, sound recording, and Sui Generis Database
+     Rights, without regard to how the rights are labeled or
+     categorized. For purposes of this Public License, the rights
+     specified in Section 2(b)(1)-(2) are not Copyright and Similar
+     Rights.
+
+  d. Effective Technological Measures means those measures that, in the
+     absence of proper authority, may not be circumvented under laws
+     fulfilling obligations under Article 11 of the WIPO Copyright
+     Treaty adopted on December 20, 1996, and/or similar international
+     agreements.
+
+  e. Exceptions and Limitations means fair use, fair dealing, and/or
+     any other exception or limitation to Copyright and Similar Rights
+     that applies to Your use of the Licensed Material.
+
+  f. Licensed Material means the artistic or literary work, database,
+     or other material to which the Licensor applied this Public
+     License.
+
+  g. Licensed Rights means the rights granted to You subject to the
+     terms and conditions of this Public License, which are limited to
+     all Copyright and Similar Rights that apply to Your use of the
+     Licensed Material and that the Licensor has authority to license.
+
+  h. Licensor means the individual(s) or entity(ies) granting rights
+     under this Public License.
+
+  i. Share means to provide material to the public by any means or
+     process that requires permission under the Licensed Rights, such
+     as reproduction, public display, public performance, distribution,
+     dissemination, communication, or importation, and to make material
+     available to the public including in ways that members of the
+     public may access the material from a place and at a time
+     individually chosen by them.
+
+  j. Sui Generis Database Rights means rights other than copyright
+     resulting from Directive 96/9/EC of the European Parliament and of
+     the Council of 11 March 1996 on the legal protection of databases,
+     as amended and/or succeeded, as well as other essentially
+     equivalent rights anywhere in the world.
+
+  k. You means the individual or entity exercising the Licensed Rights
+     under this Public License. Your has a corresponding meaning.
+
+
+Section 2 -- Scope.
+
+  a. License grant.
+
+       1. Subject to the terms and conditions of this Public License,
+          the Licensor hereby grants You a worldwide, royalty-free,
+          non-sublicensable, non-exclusive, irrevocable license to
+          exercise the Licensed Rights in the Licensed Material to:
+
+            a. reproduce and Share the Licensed Material, in whole or
+               in part; and
+
+            b. produce, reproduce, and Share Adapted Material.
+
+       2. Exceptions and Limitations. For the avoidance of doubt, where
+          Exceptions and Limitations apply to Your use, this Public
+          License does not apply, and You do not need to comply with
+          its terms and conditions.
+
+       3. Term. The term of this Public License is specified in Section
+          6(a).
+
+       4. Media and formats; technical modifications allowed. The
+          Licensor authorizes You to exercise the Licensed Rights in
+          all media and formats whether now known or hereafter created,
+          and to make technical modifications necessary to do so. The
+          Licensor waives and/or agrees not to assert any right or
+          authority to forbid You from making technical modifications
+          necessary to exercise the Licensed Rights, including
+          technical modifications necessary to circumvent Effective
+          Technological Measures. For purposes of this Public License,
+          simply making modifications authorized by this Section 2(a)
+          (4) never produces Adapted Material.
+
+       5. Downstream recipients.
+
+            a. Offer from the Licensor -- Licensed Material. Every
+               recipient of the Licensed Material automatically
+               receives an offer from the Licensor to exercise the
+               Licensed Rights under the terms and conditions of this
+               Public License.
+
+            b. No downstream restrictions. You may not offer or impose
+               any additional or different terms or conditions on, or
+               apply any Effective Technological Measures to, the
+               Licensed Material if doing so restricts exercise of the
+               Licensed Rights by any recipient of the Licensed
+               Material.
+
+       6. No endorsement. Nothing in this Public License constitutes or
+          may be construed as permission to assert or imply that You
+          are, or that Your use of the Licensed Material is, connected
+          with, or sponsored, endorsed, or granted official status by,
+          the Licensor or others designated to receive attribution as
+          provided in Section 3(a)(1)(A)(i).
+
+  b. Other rights.
+
+       1. Moral rights, such as the right of integrity, are not
+          licensed under this Public License, nor are publicity,
+          privacy, and/or other similar personality rights; however, to
+          the extent possible, the Licensor waives and/or agrees not to
+          assert any such rights held by the Licensor to the limited
+          extent necessary to allow You to exercise the Licensed
+          Rights, but not otherwise.
+
+       2. Patent and trademark rights are not licensed under this
+          Public License.
+
+       3. To the extent possible, the Licensor waives any right to
+          collect royalties from You for the exercise of the Licensed
+          Rights, whether directly or through a collecting society
+          under any voluntary or waivable statutory or compulsory
+          licensing scheme. In all other cases the Licensor expressly
+          reserves any right to collect such royalties.
+
+
+Section 3 -- License Conditions.
+
+Your exercise of the Licensed Rights is expressly made subject to the
+following conditions.
+
+  a. Attribution.
+
+       1. If You Share the Licensed Material (including in modified
+          form), You must:
+
+            a. retain the following if it is supplied by the Licensor
+               with the Licensed Material:
+
+                 i. identification of the creator(s) of the Licensed
+                    Material and any others designated to receive
+                    attribution, in any reasonable manner requested by
+                    the Licensor (including by pseudonym if
+                    designated);
+
+                ii. a copyright notice;
+
+               iii. a notice that refers to this Public License;
+
+                iv. a notice that refers to the disclaimer of
+                    warranties;
+
+                 v. a URI or hyperlink to the Licensed Material to the
+                    extent reasonably practicable;
+
+            b. indicate if You modified the Licensed Material and
+               retain an indication of any previous modifications; and
+
+            c. indicate the Licensed Material is licensed under this
+               Public License, and include the text of, or the URI or
+               hyperlink to, this Public License.
+
+       2. You may satisfy the conditions in Section 3(a)(1) in any
+          reasonable manner based on the medium, means, and context in
+          which You Share the Licensed Material. For example, it may be
+          reasonable to satisfy the conditions by providing a URI or
+          hyperlink to a resource that includes the required
+          information.
+
+       3. If requested by the Licensor, You must remove any of the
+          information required by Section 3(a)(1)(A) to the extent
+          reasonably practicable.
+
+       4. If You Share Adapted Material You produce, the Adapter's
+          License You apply must not prevent recipients of the Adapted
+          Material from complying with this Public License.
+
+
+Section 4 -- Sui Generis Database Rights.
+
+Where the Licensed Rights include Sui Generis Database Rights that
+apply to Your use of the Licensed Material:
+
+  a. for the avoidance of doubt, Section 2(a)(1) grants You the right
+     to extract, reuse, reproduce, and Share all or a substantial
+     portion of the contents of the database;
+
+  b. if You include all or a substantial portion of the database
+     contents in a database in which You have Sui Generis Database
+     Rights, then the database in which You have Sui Generis Database
+     Rights (but not its individual contents) is Adapted Material; and
+
+  c. You must comply with the conditions in Section 3(a) if You Share
+     all or a substantial portion of the contents of the database.
+
+For the avoidance of doubt, this Section 4 supplements and does not
+replace Your obligations under this Public License where the Licensed
+Rights include other Copyright and Similar Rights.
+
+
+Section 5 -- Disclaimer of Warranties and Limitation of Liability.
+
+  a. UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE
+     EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
+     AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF
+     ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS,
+     IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION,
+     WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR
+     PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS,
+     ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT
+     KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT
+     ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.
+
+  b. TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE
+     TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION,
+     NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT,
+     INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES,
+     COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR
+     USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN
+     ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR
+     DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR
+     IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.
+
+  c. The disclaimer of warranties and limitation of liability provided
+     above shall be interpreted in a manner that, to the extent
+     possible, most closely approximates an absolute disclaimer and
+     waiver of all liability.
+
+
+Section 6 -- Term and Termination.
+
+  a. This Public License applies for the term of the Copyright and
+     Similar Rights licensed here. However, if You fail to comply with
+     this Public License, then Your rights under this Public License
+     terminate automatically.
+
+  b. Where Your right to use the Licensed Material has terminated under
+     Section 6(a), it reinstates:
+
+       1. automatically as of the date the violation is cured, provided
+          it is cured within 30 days of Your discovery of the
+          violation; or
+
+       2. upon express reinstatement by the Licensor.
+
+     For the avoidance of doubt, this Section 6(b) does not affect any
+     right the Licensor may have to seek remedies for Your violations
+     of this Public License.
+
+  c. For the avoidance of doubt, the Licensor may also offer the
+     Licensed Material under separate terms or conditions or stop
+     distributing the Licensed Material at any time; however, doing so
+     will not terminate this Public License.
+
+  d. Sections 1, 5, 6, 7, and 8 survive termination of this Public
+     License.
+
+
+Section 7 -- Other Terms and Conditions.
+
+  a. The Licensor shall not be bound by any additional or different
+     terms or conditions communicated by You unless expressly agreed.
+
+  b. Any arrangements, understandings, or agreements regarding the
+     Licensed Material not stated herein are separate from and
+     independent of the terms and conditions of this Public License.
+
+
+Section 8 -- Interpretation.
+
+  a. For the avoidance of doubt, this Public License does not, and
+     shall not be interpreted to, reduce, limit, restrict, or impose
+     conditions on any use of the Licensed Material that could lawfully
+     be made without permission under this Public License.
+
+  b. To the extent possible, if any provision of this Public License is
+     deemed unenforceable, it shall be automatically reformed to the
+     minimum extent necessary to make it enforceable. If the provision
+     cannot be reformed, it shall be severed from this Public License
+     without affecting the enforceability of the remaining terms and
+     conditions.
+
+  c. No term or condition of this Public License will be waived and no
+     failure to comply consented to unless expressly agreed to by the
+     Licensor.
+
+  d. Nothing in this Public License constitutes or may be interpreted
+     as a limitation upon, or waiver of, any privileges and immunities
+     that apply to the Licensor or You, including from the legal
+     processes of any jurisdiction or authority.
+
+
+=======================================================================
+
+Creative Commons is not a party to its public
+licenses. Notwithstanding, Creative Commons may elect to apply one of
+its public licenses to material it publishes and in those instances
+will be considered the “Licensor.” The text of the Creative Commons
+public licenses is dedicated to the public domain under the CC0 Public
+Domain Dedication. Except for the limited purpose of indicating that
+material is shared under a Creative Commons public license or as
+otherwise permitted by the Creative Commons policies published at
+creativecommons.org/policies, Creative Commons does not authorize the
+use of the trademark "Creative Commons" or any other trademark or logo
+of Creative Commons without its prior written consent including,
+without limitation, in connection with any unauthorized modifications
+to any of its public licenses or any other arrangements,
+understandings, or agreements concerning use of licensed material. For
+the avoidance of doubt, this paragraph does not form part of the
+public licenses.
+
+Creative Commons may be contacted at creativecommons.org.

data/train/README.md

@@ -0,0 +1,166 @@
+# Speech Commands Data Set v0.02
+
+This is a set of one-second .wav audio files, each containing a single spoken
+English word. These words are from a small set of commands, and are spoken by a
+variety of different speakers. The audio files are organized into folders based
+on the word they contain, and this data set is designed to help train simple
+machine learning models. This dataset is covered in more detail at [https://arxiv.org/abs/1804.03209](https://arxiv.org/abs/1804.03209).
+
+It's licensed under the [Creative Commons BY 4.0
+license](https://creativecommons.org/licenses/by/4.0/). See the LICENSE
+file in this folder for full details. Its original location was at
+[http://download.tensorflow.org/data/speech_commands_v0.02.tar.gz](http://download.tensorflow.org/data/speech_commands_v0.02.tar.gz).
+
+## History
+
+Version 0.01 of the data set was released on August 3rd 2017 and contained
+64,727 audio files.
+
+This is version 0.02 of the data set containing 105,829 audio files, released on
+April 11th 2018.
+
+## Collection
+
+The audio files were collected using crowdsourcing, see
+[aiyprojects.withgoogle.com/open_speech_recording](https://github.com/petewarden/extract_loudest_section)
+for some of the open source audio collection code we used (and please consider
+contributing to enlarge this data set). The goal was to gather examples of
+people speaking single-word commands, rather than conversational sentences, so
+they were prompted for individual words over the course of a five minute
+session. Twenty core command words were recorded, with most speakers saying each
+of them five times. The core words are "Yes", "No", "Up", "Down", "Left",
+"Right", "On", "Off", "Stop", "Go", "Zero", "One", "Two", "Three", "Four",
+"Five", "Six", "Seven", "Eight", and "Nine". To help distinguish unrecognized
+words, there are also ten auxiliary words, which most speakers only said once.
+These include "Bed", "Bird", "Cat", "Dog", "Happy", "House", "Marvin", "Sheila",
+"Tree", and "Wow".
+
+## Organization
+
+The files are organized into folders, with each directory name labelling the
+word that is spoken in all the contained audio files. No details were kept of
+any of the participants age, gender, or location, and random ids were assigned
+to each individual. These ids are stable though, and encoded in each file name
+as the first part before the underscore. If a participant contributed multiple
+utterances of the same word, these are distinguished by the number at the end of
+the file name. For example, the file path `happy/3cfc6b3a_nohash_2.wav`
+indicates that the word spoken was "happy", the speaker's id was "3cfc6b3a", and
+this is the third utterance of that word by this speaker in the data set. The
+'nohash' section is to ensure that all the utterances by a single speaker are
+sorted into the same training partition, to keep very similar repetitions from
+giving unrealistically optimistic evaluation scores.
+
+## Partitioning
+
+The audio clips haven't been separated into training, test, and validation sets
+explicitly, but by convention a hashing function is used to stably assign each
+file to a set. Here's some Python code demonstrating how a complete file path
+and the desired validation and test set sizes (usually both 10%) are used to
+assign a set:
+
+```python
+MAX_NUM_WAVS_PER_CLASS = 2**27 - 1  # ~134M
+
+def which_set(filename, validation_percentage, testing_percentage):
+  """Determines which data partition the file should belong to.
+
+  We want to keep files in the same training, validation, or testing sets even
+  if new ones are added over time. This makes it less likely that testing
+  samples will accidentally be reused in training when long runs are restarted
+  for example. To keep this stability, a hash of the filename is taken and used
+  to determine which set it should belong to. This determination only depends on
+  the name and the set proportions, so it won't change as other files are added.
+
+  It's also useful to associate particular files as related (for example words
+  spoken by the same person), so anything after '_nohash_' in a filename is
+  ignored for set determination. This ensures that 'bobby_nohash_0.wav' and
+  'bobby_nohash_1.wav' are always in the same set, for example.
+
+  Args:
+    filename: File path of the data sample.
+    validation_percentage: How much of the data set to use for validation.
+    testing_percentage: How much of the data set to use for testing.
+
+  Returns:
+    String, one of 'training', 'validation', or 'testing'.
+  """
+  base_name = os.path.basename(filename)
+  # We want to ignore anything after '_nohash_' in the file name when
+  # deciding which set to put a wav in, so the data set creator has a way of
+  # grouping wavs that are close variations of each other.
+  hash_name = re.sub(r'_nohash_.*$', '', base_name)
+  # This looks a bit magical, but we need to decide whether this file should
+  # go into the training, testing, or validation sets, and we want to keep
+  # existing files in the same set even if more files are subsequently
+  # added.
+  # To do that, we need a stable way of deciding based on just the file name
+  # itself, so we do a hash of that and then use that to generate a
+  # probability value that we use to assign it.
+  hash_name_hashed = hashlib.sha1(hash_name).hexdigest()
+  percentage_hash = ((int(hash_name_hashed, 16) %
+                      (MAX_NUM_WAVS_PER_CLASS + 1)) *
+                     (100.0 / MAX_NUM_WAVS_PER_CLASS))
+  if percentage_hash < validation_percentage:
+    result = 'validation'
+  elif percentage_hash < (testing_percentage + validation_percentage):
+    result = 'testing'
+  else:
+    result = 'training'
+  return result
+```
+
+The results of running this over the current set are included in this archive as
+validation_list.txt and testing_list.txt. These text files contain the paths to
+all the files in each set, with each path on a new line. Any files that aren't
+in either of these lists can be considered to be part of the training set.
+
+## Processing
+
+The original audio files were collected in uncontrolled locations by people
+around the world. We requested that they do the recording in a closed room for
+privacy reasons, but didn't stipulate any quality requirements. This was by
+design, since we wanted examples of the sort of speech data that we're likely to
+encounter in consumer and robotics applications, where we don't have much
+control over the recording equipment or environment. The data was captured in a
+variety of formats, for example Ogg Vorbis encoding for the web app, and then
+converted to a 16-bit little-endian PCM-encoded WAVE file at a 16000 sample
+rate. The audio was then trimmed to a one second length to align most
+utterances, using the
+[extract_loudest_section](https://github.com/petewarden/extract_loudest_section)
+tool. The audio files were then screened for silence or incorrect words, and
+arranged into folders by label.
+
+## Background Noise
+
+To help train networks to cope with noisy environments, it can be helpful to mix
+in realistic background audio. The `_silence_` folder contains a set of
+longer audio clips that are either recordings or mathematical simulations of
+noise. 
+
+## Citations
+
+If you use the Speech Commands dataset in your work, please cite it as:
+
+```
+@article{speechcommandsv2,
+   author = {{Warden}, P.},
+    title = "{Speech Commands: A Dataset for Limited-Vocabulary Speech Recognition}",
+  journal = {ArXiv e-prints},
+archivePrefix = "arXiv",
+   eprint = {1804.03209},
+ primaryClass = "cs.CL",
+ keywords = {Computer Science - Computation and Language, Computer Science - Human-Computer Interaction},
+     year = 2018,
+    month = apr,
+    url = {https://arxiv.org/abs/1804.03209},
+}
+```
+
+## Credits
+
+Massive thanks are due to everyone who donated recordings to this data set, I'm
+very grateful. I also couldn't have put this together without the help and
+support of Billy Rutledge, Rajat Monga, Raziel Alvarez, Brad Krueger, Barbara
+Petit, Gursheesh Kour, and all the AIY and TensorFlow teams.
+
+Pete Warden, petewarden@google.com

data/train/eight/01b4757a_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9d9a439ab833ed60261ccbce6b034cb160d6ec2b3e0589589b7c4c5cb56e7fbb
+size 32044

data/train/eight/042a8dde_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:330f145395910027276b881c2c8ebee88ab0e4ce1ef60d8c0e3f196ea392987a
+size 32044

data/train/eight/07089da9_nohash_4.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4dc73661df37cddef069a0ddb2653eea4eee194323e2d15fe5bd9d204af42db5
+size 32044

data/train/eight/0819edb0_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:9c9df4856fb6bb263104083fa6cf45b42f4966abcd201265cd94d4bedb900048
+size 32044

data/train/eight/0b09edd3_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:34b8ebb4a9a60a244c9f07c8fad332939e42dcab518646a973159a941d575098
+size 24620

data/train/eight/0ba018fc_nohash_4.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4f8e43bfb2063fb1a4a81e806fd4416539b77da067402cbc6d1c89580b523708
+size 32044

data/train/eight/129c7d8d_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d12dc72b1bbf32c71deea83c7e585c4e672e7d54f0a80debeacb42236ec2a8a4
+size 32044

data/train/eight/14c7b073_nohash_3.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:011fce31794eaaaca127c092ff3bbb549f689152acbd0a47fc7ce5e20747b61c
+size 32044

data/train/eight/1afd49bf_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b30bb63001a1ca54eb880f0b68209f592c5686ccc6066b7060f4777936bf52ae
+size 30082

data/train/eight/256c0a05_nohash_3.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:eea4c61cb017e5cd8094c540741a243351e6fbc074d006161c29bdd91671c5a0
+size 32044

data/train/eight/30802c5d_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:42e5d400fc898016d6fb8a60948f7cab62808f1681c9a324fef94b0b86eef15b
+size 32044

data/train/eight/31583d30_nohash_2.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:34a0967e45d2f4ee75e142efa7abe5021bc47facb7755109a082b1887686a337
+size 32044

data/train/eight/3d53244b_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:22d6159d5923875f5054eeb72758658d20cdb5fcbe55e0108695525eb84dea11
+size 32044

data/train/eight/435695e3_nohash_1.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:934db0ee9dfdec4e4c3a697d45a33c7945e909c8c2e53fc534e6d01bb7eea0d1
+size 32044

data/train/eight/4e99c1b7_nohash_1.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6b91a2bc2ec51681fb397ff73e1cb6523bbe645edc11b778aeba077e2e7f61bc
+size 32044

data/train/eight/645ed69d_nohash_3.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:46ed726fa5f099b48c1b829a4275093f6c1311c567f48d27358c7d32358f6079
+size 32044

data/train/eight/78030270_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:07b640768cd552fd3846db50e790625b5bbf17b40404bf0ae92d9b4e485810a7
+size 31448

data/train/eight/7ff4fc72_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:965dd665245bcb36254c6f73501cf85c47910469000c7a4c024bd8918f126c9d
+size 32044

data/train/eight/833d9f56_nohash_3.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ef7a96a26388fcfe090c9a794df7be548709b806dd9746dabe9630c4ef35d1aa
+size 32044

data/train/eight/8b25410a_nohash_3.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:521fa1018391a887debd9f21557668e69e097f778be75c02e566b2c8be7f5f92
+size 32044

data/train/eight/8eb4a1bf_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:db807a5be97863c476093f7a92e4d5b36f9caf53f64e7ebe0d368a440c0f3e3e
+size 32044

data/train/eight/9151f184_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6442b28a922090c3c198b7b392cc6b0c43e274027c8fb2074e35babeba87c026
+size 32044

data/train/eight/a996cf66_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4eee9b69e70b92c02e7ede9155f7c11a2d850ea842d8eef21fd575f3db608c97
+size 28280

data/train/eight/b0ae6326_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5135e3c61c3aab54c01ced83c5b8a436d98f0c9188e7d10fbdd3f3c390d3228c
+size 32044

data/train/eight/b4ea0d9a_nohash_6.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b4140963027f7cf1d2253e27efeba86c46b00653674342e9d9a4cca3e6e5dfe0
+size 32044

data/train/eight/b76f6088_nohash_4.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5da5cbbe1387d61078b85c552f9fa6eae1caaef08e5a24935443e03c02f29d7d
+size 32044

data/train/eight/bb6d4301_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:41501bc4851c666c8d3ca8533b97ab1df70e916f67a5b47733a310fc74cf01da
+size 32044

data/train/eight/bbf38549_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ff40f99ec7885235926d0ad488750b6edaa4ce58bd9723b199080d03d9062231
+size 32044

data/train/eight/c9b653a0_nohash_3.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2867efff8038b716aecb6ef6078e8256b09b927bb95ce1d92381819b21a5a97e
+size 32044

data/train/eight/cc3b5b62_nohash_3.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:602790dc078b16779d19bffe6fea591196daf2a635442edd559cd18e44b04b32
+size 32044

data/train/eight/ccfd721c_nohash_1.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b80fcdde5428494ade3d149cf89887f52cacf6a3c998e111eb4e92d1948d625e
+size 32044

data/train/eight/db9cd41d_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:e4425471f5a69c18e224de95168479031a637cd39bb961a0aa5c55b7c8f53847
+size 31252

data/train/eight/dbb7723a_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f53d6fec05d4fd4b83bb05c5440a5d553d8cbb1ba6756e7795d8736df88d88a3
+size 23256

data/train/eight/ed032775_nohash_1.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4c625a398fac3fdd981d44d04f164304c215e7eae7a90e0c930caa2715931920
+size 32044

data/train/eight/ef3367d9_nohash_3.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:876e555b72c195ab0a09b1ba9cd773095c530544e117fdd0740bd8d46531027a
+size 32044

data/train/eight/efbc3952_nohash_2.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:96b9c7f7924ff517c3319a266cf56aef44b6de179a7100faf26c4b6727cf9b92
+size 32044

data/train/eight/fa57ab3b_nohash_4.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:51a0534aadf2ddfd2e5cd997fe906cdb1c2879be70b9823a3550acc97325278b
+size 32044

data/train/eight/fb7c9b3b_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:600e1f18196b8224be467e2076d1c349308e65972d6bd8957d19a98e506821f4
+size 32044

data/train/eight/fcb25a78_nohash_0.wav

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:1249b0b34512260290a02a67c4708edcf4f1017ac491debdcc9c3dd477974878
+size 32044

data/validation/LICENSE

@@ -0,0 +1,395 @@
+Attribution 4.0 International
+
+=======================================================================
+
+Creative Commons Corporation ("Creative Commons") is not a law firm and
+does not provide legal services or legal advice. Distribution of
+Creative Commons public licenses does not create a lawyer-client or
+other relationship. Creative Commons makes its licenses and related
+information available on an "as-is" basis. Creative Commons gives no
+warranties regarding its licenses, any material licensed under their
+terms and conditions, or any related information. Creative Commons
+disclaims all liability for damages resulting from their use to the
+fullest extent possible.
+
+Using Creative Commons Public Licenses
+
+Creative Commons public licenses provide a standard set of terms and
+conditions that creators and other rights holders may use to share
+original works of authorship and other material subject to copyright
+and certain other rights specified in the public license below. The
+following considerations are for informational purposes only, are not
+exhaustive, and do not form part of our licenses.
+
+     Considerations for licensors: Our public licenses are
+     intended for use by those authorized to give the public
+     permission to use material in ways otherwise restricted by
+     copyright and certain other rights. Our licenses are
+     irrevocable. Licensors should read and understand the terms
+     and conditions of the license they choose before applying it.
+     Licensors should also secure all rights necessary before
+     applying our licenses so that the public can reuse the
+     material as expected. Licensors should clearly mark any
+     material not subject to the license. This includes other CC-
+     licensed material, or material used under an exception or
+     limitation to copyright. More considerations for licensors:
+	wiki.creativecommons.org/Considerations_for_licensors
+
+     Considerations for the public: By using one of our public
+     licenses, a licensor grants the public permission to use the
+     licensed material under specified terms and conditions. If
+     the licensor's permission is not necessary for any reason--for
+     example, because of any applicable exception or limitation to
+     copyright--then that use is not regulated by the license. Our
+     licenses grant only permissions under copyright and certain
+     other rights that a licensor has authority to grant. Use of
+     the licensed material may still be restricted for other
+     reasons, including because others have copyright or other
+     rights in the material. A licensor may make special requests,
+     such as asking that all changes be marked or described.
+     Although not required by our licenses, you are encouraged to
+     respect those requests where reasonable. More_considerations
+     for the public: 
+	wiki.creativecommons.org/Considerations_for_licensees
+
+=======================================================================
+
+Creative Commons Attribution 4.0 International Public License
+
+By exercising the Licensed Rights (defined below), You accept and agree
+to be bound by the terms and conditions of this Creative Commons
+Attribution 4.0 International Public License ("Public License"). To the
+extent this Public License may be interpreted as a contract, You are
+granted the Licensed Rights in consideration of Your acceptance of
+these terms and conditions, and the Licensor grants You such rights in
+consideration of benefits the Licensor receives from making the
+Licensed Material available under these terms and conditions.
+
+
+Section 1 -- Definitions.
+
+  a. Adapted Material means material subject to Copyright and Similar
+     Rights that is derived from or based upon the Licensed Material
+     and in which the Licensed Material is translated, altered,
+     arranged, transformed, or otherwise modified in a manner requiring
+     permission under the Copyright and Similar Rights held by the
+     Licensor. For purposes of this Public License, where the Licensed
+     Material is a musical work, performance, or sound recording,
+     Adapted Material is always produced where the Licensed Material is
+     synched in timed relation with a moving image.
+
+  b. Adapter's License means the license You apply to Your Copyright
+     and Similar Rights in Your contributions to Adapted Material in
+     accordance with the terms and conditions of this Public License.
+
+  c. Copyright and Similar Rights means copyright and/or similar rights
+     closely related to copyright including, without limitation,
+     performance, broadcast, sound recording, and Sui Generis Database
+     Rights, without regard to how the rights are labeled or
+     categorized. For purposes of this Public License, the rights
+     specified in Section 2(b)(1)-(2) are not Copyright and Similar
+     Rights.
+
+  d. Effective Technological Measures means those measures that, in the
+     absence of proper authority, may not be circumvented under laws
+     fulfilling obligations under Article 11 of the WIPO Copyright
+     Treaty adopted on December 20, 1996, and/or similar international
+     agreements.
+
+  e. Exceptions and Limitations means fair use, fair dealing, and/or
+     any other exception or limitation to Copyright and Similar Rights
+     that applies to Your use of the Licensed Material.
+
+  f. Licensed Material means the artistic or literary work, database,
+     or other material to which the Licensor applied this Public
+     License.
+
+  g. Licensed Rights means the rights granted to You subject to the
+     terms and conditions of this Public License, which are limited to
+     all Copyright and Similar Rights that apply to Your use of the
+     Licensed Material and that the Licensor has authority to license.
+
+  h. Licensor means the individual(s) or entity(ies) granting rights
+     under this Public License.
+
+  i. Share means to provide material to the public by any means or
+     process that requires permission under the Licensed Rights, such
+     as reproduction, public display, public performance, distribution,
+     dissemination, communication, or importation, and to make material
+     available to the public including in ways that members of the
+     public may access the material from a place and at a time
+     individually chosen by them.
+
+  j. Sui Generis Database Rights means rights other than copyright
+     resulting from Directive 96/9/EC of the European Parliament and of
+     the Council of 11 March 1996 on the legal protection of databases,
+     as amended and/or succeeded, as well as other essentially
+     equivalent rights anywhere in the world.
+
+  k. You means the individual or entity exercising the Licensed Rights
+     under this Public License. Your has a corresponding meaning.
+
+
+Section 2 -- Scope.
+
+  a. License grant.
+
+       1. Subject to the terms and conditions of this Public License,
+          the Licensor hereby grants You a worldwide, royalty-free,
+          non-sublicensable, non-exclusive, irrevocable license to
+          exercise the Licensed Rights in the Licensed Material to:
+
+            a. reproduce and Share the Licensed Material, in whole or
+               in part; and
+
+            b. produce, reproduce, and Share Adapted Material.
+
+       2. Exceptions and Limitations. For the avoidance of doubt, where
+          Exceptions and Limitations apply to Your use, this Public
+          License does not apply, and You do not need to comply with
+          its terms and conditions.
+
+       3. Term. The term of this Public License is specified in Section
+          6(a).
+
+       4. Media and formats; technical modifications allowed. The
+          Licensor authorizes You to exercise the Licensed Rights in
+          all media and formats whether now known or hereafter created,
+          and to make technical modifications necessary to do so. The
+          Licensor waives and/or agrees not to assert any right or
+          authority to forbid You from making technical modifications
+          necessary to exercise the Licensed Rights, including
+          technical modifications necessary to circumvent Effective
+          Technological Measures. For purposes of this Public License,
+          simply making modifications authorized by this Section 2(a)
+          (4) never produces Adapted Material.
+
+       5. Downstream recipients.
+
+            a. Offer from the Licensor -- Licensed Material. Every
+               recipient of the Licensed Material automatically
+               receives an offer from the Licensor to exercise the
+               Licensed Rights under the terms and conditions of this
+               Public License.
+
+            b. No downstream restrictions. You may not offer or impose
+               any additional or different terms or conditions on, or
+               apply any Effective Technological Measures to, the
+               Licensed Material if doing so restricts exercise of the
+               Licensed Rights by any recipient of the Licensed
+               Material.
+
+       6. No endorsement. Nothing in this Public License constitutes or
+          may be construed as permission to assert or imply that You
+          are, or that Your use of the Licensed Material is, connected
+          with, or sponsored, endorsed, or granted official status by,
+          the Licensor or others designated to receive attribution as
+          provided in Section 3(a)(1)(A)(i).
+
+  b. Other rights.
+
+       1. Moral rights, such as the right of integrity, are not
+          licensed under this Public License, nor are publicity,
+          privacy, and/or other similar personality rights; however, to
+          the extent possible, the Licensor waives and/or agrees not to
+          assert any such rights held by the Licensor to the limited
+          extent necessary to allow You to exercise the Licensed
+          Rights, but not otherwise.
+
+       2. Patent and trademark rights are not licensed under this
+          Public License.
+
+       3. To the extent possible, the Licensor waives any right to
+          collect royalties from You for the exercise of the Licensed
+          Rights, whether directly or through a collecting society
+          under any voluntary or waivable statutory or compulsory
+          licensing scheme. In all other cases the Licensor expressly
+          reserves any right to collect such royalties.
+
+
+Section 3 -- License Conditions.
+
+Your exercise of the Licensed Rights is expressly made subject to the
+following conditions.
+
+  a. Attribution.
+
+       1. If You Share the Licensed Material (including in modified
+          form), You must:
+
+            a. retain the following if it is supplied by the Licensor
+               with the Licensed Material:
+
+                 i. identification of the creator(s) of the Licensed
+                    Material and any others designated to receive
+                    attribution, in any reasonable manner requested by
+                    the Licensor (including by pseudonym if
+                    designated);
+
+                ii. a copyright notice;
+
+               iii. a notice that refers to this Public License;
+
+                iv. a notice that refers to the disclaimer of
+                    warranties;
+
+                 v. a URI or hyperlink to the Licensed Material to the
+                    extent reasonably practicable;
+
+            b. indicate if You modified the Licensed Material and
+               retain an indication of any previous modifications; and
+
+            c. indicate the Licensed Material is licensed under this
+               Public License, and include the text of, or the URI or
+               hyperlink to, this Public License.
+
+       2. You may satisfy the conditions in Section 3(a)(1) in any
+          reasonable manner based on the medium, means, and context in
+          which You Share the Licensed Material. For example, it may be
+          reasonable to satisfy the conditions by providing a URI or
+          hyperlink to a resource that includes the required
+          information.
+
+       3. If requested by the Licensor, You must remove any of the
+          information required by Section 3(a)(1)(A) to the extent
+          reasonably practicable.
+
+       4. If You Share Adapted Material You produce, the Adapter's
+          License You apply must not prevent recipients of the Adapted
+          Material from complying with this Public License.
+
+
+Section 4 -- Sui Generis Database Rights.
+
+Where the Licensed Rights include Sui Generis Database Rights that
+apply to Your use of the Licensed Material:
+
+  a. for the avoidance of doubt, Section 2(a)(1) grants You the right
+     to extract, reuse, reproduce, and Share all or a substantial
+     portion of the contents of the database;
+
+  b. if You include all or a substantial portion of the database
+     contents in a database in which You have Sui Generis Database
+     Rights, then the database in which You have Sui Generis Database
+     Rights (but not its individual contents) is Adapted Material; and
+
+  c. You must comply with the conditions in Section 3(a) if You Share
+     all or a substantial portion of the contents of the database.
+
+For the avoidance of doubt, this Section 4 supplements and does not
+replace Your obligations under this Public License where the Licensed
+Rights include other Copyright and Similar Rights.
+
+
+Section 5 -- Disclaimer of Warranties and Limitation of Liability.
+
+  a. UNLESS OTHERWISE SEPARATELY UNDERTAKEN BY THE LICENSOR, TO THE
+     EXTENT POSSIBLE, THE LICENSOR OFFERS THE LICENSED MATERIAL AS-IS
+     AND AS-AVAILABLE, AND MAKES NO REPRESENTATIONS OR WARRANTIES OF
+     ANY KIND CONCERNING THE LICENSED MATERIAL, WHETHER EXPRESS,
+     IMPLIED, STATUTORY, OR OTHER. THIS INCLUDES, WITHOUT LIMITATION,
+     WARRANTIES OF TITLE, MERCHANTABILITY, FITNESS FOR A PARTICULAR
+     PURPOSE, NON-INFRINGEMENT, ABSENCE OF LATENT OR OTHER DEFECTS,
+     ACCURACY, OR THE PRESENCE OR ABSENCE OF ERRORS, WHETHER OR NOT
+     KNOWN OR DISCOVERABLE. WHERE DISCLAIMERS OF WARRANTIES ARE NOT
+     ALLOWED IN FULL OR IN PART, THIS DISCLAIMER MAY NOT APPLY TO YOU.
+
+  b. TO THE EXTENT POSSIBLE, IN NO EVENT WILL THE LICENSOR BE LIABLE
+     TO YOU ON ANY LEGAL THEORY (INCLUDING, WITHOUT LIMITATION,
+     NEGLIGENCE) OR OTHERWISE FOR ANY DIRECT, SPECIAL, INDIRECT,
+     INCIDENTAL, CONSEQUENTIAL, PUNITIVE, EXEMPLARY, OR OTHER LOSSES,
+     COSTS, EXPENSES, OR DAMAGES ARISING OUT OF THIS PUBLIC LICENSE OR
+     USE OF THE LICENSED MATERIAL, EVEN IF THE LICENSOR HAS BEEN
+     ADVISED OF THE POSSIBILITY OF SUCH LOSSES, COSTS, EXPENSES, OR
+     DAMAGES. WHERE A LIMITATION OF LIABILITY IS NOT ALLOWED IN FULL OR
+     IN PART, THIS LIMITATION MAY NOT APPLY TO YOU.
+
+  c. The disclaimer of warranties and limitation of liability provided
+     above shall be interpreted in a manner that, to the extent
+     possible, most closely approximates an absolute disclaimer and
+     waiver of all liability.
+
+
+Section 6 -- Term and Termination.
+
+  a. This Public License applies for the term of the Copyright and
+     Similar Rights licensed here. However, if You fail to comply with
+     this Public License, then Your rights under this Public License
+     terminate automatically.
+
+  b. Where Your right to use the Licensed Material has terminated under
+     Section 6(a), it reinstates:
+
+       1. automatically as of the date the violation is cured, provided
+          it is cured within 30 days of Your discovery of the
+          violation; or
+
+       2. upon express reinstatement by the Licensor.
+
+     For the avoidance of doubt, this Section 6(b) does not affect any
+     right the Licensor may have to seek remedies for Your violations
+     of this Public License.
+
+  c. For the avoidance of doubt, the Licensor may also offer the
+     Licensed Material under separate terms or conditions or stop
+     distributing the Licensed Material at any time; however, doing so
+     will not terminate this Public License.
+
+  d. Sections 1, 5, 6, 7, and 8 survive termination of this Public
+     License.
+
+
+Section 7 -- Other Terms and Conditions.
+
+  a. The Licensor shall not be bound by any additional or different
+     terms or conditions communicated by You unless expressly agreed.
+
+  b. Any arrangements, understandings, or agreements regarding the
+     Licensed Material not stated herein are separate from and
+     independent of the terms and conditions of this Public License.
+
+
+Section 8 -- Interpretation.
+
+  a. For the avoidance of doubt, this Public License does not, and
+     shall not be interpreted to, reduce, limit, restrict, or impose
+     conditions on any use of the Licensed Material that could lawfully
+     be made without permission under this Public License.
+
+  b. To the extent possible, if any provision of this Public License is
+     deemed unenforceable, it shall be automatically reformed to the
+     minimum extent necessary to make it enforceable. If the provision
+     cannot be reformed, it shall be severed from this Public License
+     without affecting the enforceability of the remaining terms and
+     conditions.
+
+  c. No term or condition of this Public License will be waived and no
+     failure to comply consented to unless expressly agreed to by the
+     Licensor.
+
+  d. Nothing in this Public License constitutes or may be interpreted
+     as a limitation upon, or waiver of, any privileges and immunities
+     that apply to the Licensor or You, including from the legal
+     processes of any jurisdiction or authority.
+
+
+=======================================================================
+
+Creative Commons is not a party to its public
+licenses. Notwithstanding, Creative Commons may elect to apply one of
+its public licenses to material it publishes and in those instances
+will be considered the “Licensor.” The text of the Creative Commons
+public licenses is dedicated to the public domain under the CC0 Public
+Domain Dedication. Except for the limited purpose of indicating that
+material is shared under a Creative Commons public license or as
+otherwise permitted by the Creative Commons policies published at
+creativecommons.org/policies, Creative Commons does not authorize the
+use of the trademark "Creative Commons" or any other trademark or logo
+of Creative Commons without its prior written consent including,
+without limitation, in connection with any unauthorized modifications
+to any of its public licenses or any other arrangements,
+understandings, or agreements concerning use of licensed material. For
+the avoidance of doubt, this paragraph does not form part of the
+public licenses.
+
+Creative Commons may be contacted at creativecommons.org.

data/validation/README.md

@@ -0,0 +1,166 @@
+# Speech Commands Data Set v0.02
+
+This is a set of one-second .wav audio files, each containing a single spoken
+English word. These words are from a small set of commands, and are spoken by a
+variety of different speakers. The audio files are organized into folders based
+on the word they contain, and this data set is designed to help train simple
+machine learning models. This dataset is covered in more detail at [https://arxiv.org/abs/1804.03209](https://arxiv.org/abs/1804.03209).
+
+It's licensed under the [Creative Commons BY 4.0
+license](https://creativecommons.org/licenses/by/4.0/). See the LICENSE
+file in this folder for full details. Its original location was at
+[http://download.tensorflow.org/data/speech_commands_v0.02.tar.gz](http://download.tensorflow.org/data/speech_commands_v0.02.tar.gz).
+
+## History
+
+Version 0.01 of the data set was released on August 3rd 2017 and contained
+64,727 audio files.
+
+This is version 0.02 of the data set containing 105,829 audio files, released on
+April 11th 2018.
+
+## Collection
+
+The audio files were collected using crowdsourcing, see
+[aiyprojects.withgoogle.com/open_speech_recording](https://github.com/petewarden/extract_loudest_section)
+for some of the open source audio collection code we used (and please consider
+contributing to enlarge this data set). The goal was to gather examples of
+people speaking single-word commands, rather than conversational sentences, so
+they were prompted for individual words over the course of a five minute
+session. Twenty core command words were recorded, with most speakers saying each
+of them five times. The core words are "Yes", "No", "Up", "Down", "Left",
+"Right", "On", "Off", "Stop", "Go", "Zero", "One", "Two", "Three", "Four",
+"Five", "Six", "Seven", "Eight", and "Nine". To help distinguish unrecognized
+words, there are also ten auxiliary words, which most speakers only said once.
+These include "Bed", "Bird", "Cat", "Dog", "Happy", "House", "Marvin", "Sheila",
+"Tree", and "Wow".
+
+## Organization
+
+The files are organized into folders, with each directory name labelling the
+word that is spoken in all the contained audio files. No details were kept of
+any of the participants age, gender, or location, and random ids were assigned
+to each individual. These ids are stable though, and encoded in each file name
+as the first part before the underscore. If a participant contributed multiple
+utterances of the same word, these are distinguished by the number at the end of
+the file name. For example, the file path `happy/3cfc6b3a_nohash_2.wav`
+indicates that the word spoken was "happy", the speaker's id was "3cfc6b3a", and
+this is the third utterance of that word by this speaker in the data set. The
+'nohash' section is to ensure that all the utterances by a single speaker are
+sorted into the same training partition, to keep very similar repetitions from
+giving unrealistically optimistic evaluation scores.
+
+## Partitioning
+
+The audio clips haven't been separated into training, test, and validation sets
+explicitly, but by convention a hashing function is used to stably assign each
+file to a set. Here's some Python code demonstrating how a complete file path
+and the desired validation and test set sizes (usually both 10%) are used to
+assign a set:
+
+```python
+MAX_NUM_WAVS_PER_CLASS = 2**27 - 1  # ~134M
+
+def which_set(filename, validation_percentage, testing_percentage):
+  """Determines which data partition the file should belong to.
+
+  We want to keep files in the same training, validation, or testing sets even
+  if new ones are added over time. This makes it less likely that testing
+  samples will accidentally be reused in training when long runs are restarted
+  for example. To keep this stability, a hash of the filename is taken and used
+  to determine which set it should belong to. This determination only depends on
+  the name and the set proportions, so it won't change as other files are added.
+
+  It's also useful to associate particular files as related (for example words
+  spoken by the same person), so anything after '_nohash_' in a filename is
+  ignored for set determination. This ensures that 'bobby_nohash_0.wav' and
+  'bobby_nohash_1.wav' are always in the same set, for example.
+
+  Args:
+    filename: File path of the data sample.
+    validation_percentage: How much of the data set to use for validation.
+    testing_percentage: How much of the data set to use for testing.
+
+  Returns:
+    String, one of 'training', 'validation', or 'testing'.
+  """
+  base_name = os.path.basename(filename)
+  # We want to ignore anything after '_nohash_' in the file name when
+  # deciding which set to put a wav in, so the data set creator has a way of
+  # grouping wavs that are close variations of each other.
+  hash_name = re.sub(r'_nohash_.*$', '', base_name)
+  # This looks a bit magical, but we need to decide whether this file should
+  # go into the training, testing, or validation sets, and we want to keep
+  # existing files in the same set even if more files are subsequently
+  # added.
+  # To do that, we need a stable way of deciding based on just the file name
+  # itself, so we do a hash of that and then use that to generate a
+  # probability value that we use to assign it.
+  hash_name_hashed = hashlib.sha1(hash_name).hexdigest()
+  percentage_hash = ((int(hash_name_hashed, 16) %
+                      (MAX_NUM_WAVS_PER_CLASS + 1)) *
+                     (100.0 / MAX_NUM_WAVS_PER_CLASS))
+  if percentage_hash < validation_percentage:
+    result = 'validation'
+  elif percentage_hash < (testing_percentage + validation_percentage):
+    result = 'testing'
+  else:
+    result = 'training'
+  return result
+```
+
+The results of running this over the current set are included in this archive as
+validation_list.txt and testing_list.txt. These text files contain the paths to
+all the files in each set, with each path on a new line. Any files that aren't
+in either of these lists can be considered to be part of the training set.
+
+## Processing
+
+The original audio files were collected in uncontrolled locations by people
+around the world. We requested that they do the recording in a closed room for
+privacy reasons, but didn't stipulate any quality requirements. This was by
+design, since we wanted examples of the sort of speech data that we're likely to
+encounter in consumer and robotics applications, where we don't have much
+control over the recording equipment or environment. The data was captured in a
+variety of formats, for example Ogg Vorbis encoding for the web app, and then
+converted to a 16-bit little-endian PCM-encoded WAVE file at a 16000 sample
+rate. The audio was then trimmed to a one second length to align most
+utterances, using the
+[extract_loudest_section](https://github.com/petewarden/extract_loudest_section)
+tool. The audio files were then screened for silence or incorrect words, and
+arranged into folders by label.
+
+## Background Noise
+
+To help train networks to cope with noisy environments, it can be helpful to mix
+in realistic background audio. The `_silence_` folder contains a set of
+longer audio clips that are either recordings or mathematical simulations of
+noise. 
+
+## Citations
+
+If you use the Speech Commands dataset in your work, please cite it as:
+
+```
+@article{speechcommandsv2,
+   author = {{Warden}, P.},
+    title = "{Speech Commands: A Dataset for Limited-Vocabulary Speech Recognition}",
+  journal = {ArXiv e-prints},
+archivePrefix = "arXiv",
+   eprint = {1804.03209},
+ primaryClass = "cs.CL",
+ keywords = {Computer Science - Computation and Language, Computer Science - Human-Computer Interaction},
+     year = 2018,
+    month = apr,
+    url = {https://arxiv.org/abs/1804.03209},
+}
+```
+
+## Credits
+
+Massive thanks are due to everyone who donated recordings to this data set, I'm
+very grateful. I also couldn't have put this together without the help and
+support of Billy Rutledge, Rajat Monga, Raziel Alvarez, Brad Krueger, Barbara
+Petit, Gursheesh Kour, and all the AIY and TensorFlow teams.
+
+Pete Warden, petewarden@google.com