You can load an audio dataset using the [Audio
] feature that automatically decodes and resamples the audio files when you access the examples.
Audio decoding is based on the soundfile
python package, which uses the libsndfile
C library under the hood.
To work with audio datasets, you need to have the audio
dependencies installed.
Check out the installation guide to learn how to install it.
You can load your own dataset using the paths to your audio files. Use the [~Dataset.cast_column
] function to take a column of audio file paths, and cast it to the [Audio
] feature:
>>> audio_dataset = Dataset.from_dict({"audio": ["path/to/audio_1", "path/to/audio_2", ..., "path/to/audio_n"]}).cast_column("audio", Audio())
>>> audio_dataset[0]["audio"]
{'array': array([ 0. , 0.00024414, -0.00024414, ..., -0.00024414,
0. , 0. ], dtype=float32),
'path': 'path/to/audio_1',
'sampling_rate': 16000}
You can also load a dataset with an AudioFolder
dataset builder. It does not require writing a custom dataloader, making it useful for quickly creating and loading audio datasets with several thousand audio files.
To link your audio files with metadata information, make sure your dataset has a metadata.csv
file. Your dataset structure might look like:
folder/train/metadata.csv
folder/train/first_audio_file.mp3
folder/train/second_audio_file.mp3
folder/train/third_audio_file.mp3
Your metadata.csv
file must have a file_name
column which links audio files with their metadata. An example metadata.csv
file might look like:
file_name,transcription
first_audio_file.mp3,znowu si臋 duch z cia艂em zro艣nie w m艂odocianej wstaniesz wiosnie i mo偶esz skutkiem tych lek贸w umiera膰 wstawa膰 wiek wiek贸w dalej tam by艂y przestrogi jak sieka膰 g艂ow臋 jak nogi
second_audio_file.mp3,ju偶 u 藕wierzy艅ca podwoj贸w kr贸l zasiada przy nim ksi膮偶臋ta i panowie rada a gdzie wznios艂y kr膮偶y艂 ganek rycerze obok kochanek kr贸l skin膮艂 palcem zacz臋to igrzysko
third_audio_file.mp3,pewnie k臋dy艣 w ob艂臋dzie ubite min臋艂y szlaki zaczekajmy dzie艅 jaki po艣lemy szuka膰 wsz臋dzie dzi艣 jutro pewnie b臋dzie pos艂ali wsz臋dzie s艂ugi czekali dzie艅 i drugi gdy nic nie doczekali z p艂aczem chc膮 jecha膰 dali
AudioFolder
will load audio data and create a transcription
column containing texts from metadata.csv
:
>>> from datasets import load_dataset
>>> dataset = load_dataset("audiofolder", data_dir="/path/to/folder")
>>> # OR by specifying the list of files
>>> dataset = load_dataset("audiofolder", data_files=["path/to/audio_1", "path/to/audio_2", ..., "path/to/audio_n"])
You can load remote datasets from their URLs with the data_files parameter:
>>> dataset = load_dataset("audiofolder", data_files=["https://foo.bar/audio_1", "https://foo.bar/audio_2", ..., "https://foo.bar/audio_n"]
>>> # for example, pass SpeechCommands archive:
>>> dataset = load_dataset("audiofolder", data_files="https://s3.amazonaws.com/datasets.huggingface.co/SpeechCommands/v0.01/v0.01_test.tar.gz")
Metadata can also be specified as JSON Lines, in which case use metadata.jsonl
as the name of the metadata file. This format is helpful in scenarios when one of the columns is complex, e.g. a list of floats, to avoid parsing errors or reading the complex values as strings.
To ignore the information in the metadata file, set drop_metadata=True
in [load_dataset
]:
>>> from datasets import load_dataset
>>> dataset = load_dataset("audiofolder", data_dir="/path/to/folder", drop_metadata=True)
If you don't have a metadata file, AudioFolder
automatically infers the label name from the directory name.
If you want to drop automatically created labels, set drop_labels=True
.
In this case, your dataset will only contain an audio column:
>>> from datasets import load_dataset
>>> dataset = load_dataset("audiofolder", data_dir="/path/to/folder_without_metadata", drop_labels=True)
For more information about creating your own AudioFolder
dataset, take a look at the Create an audio dataset guide.
For a guide on how to load any type of dataset, take a look at the general loading guide.