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* silly change to allow making a PR * clean up doc comments * simplify hertz_to_mel and mel_to_hertz * fixup * clean up power_to_db * also add amplitude_to_db * move functions * clean up mel_filter_bank * fixup * credit librosa & torchaudio authors * add unit tests * tests for power_to_db and amplitude_to_db * add mel_filter_bank tests * rewrite STFT * add convenience spectrogram function * missing transpose * fewer transposes * add integration test to M-CTC-T * frame length can be either window or FFT length * rewrite stft API * add preemphasis coefficient * move argument * add log option to spectrogram * replace M-CTC-T feature extractor * fix api thing * replace whisper STFT * replace whisper mel filters * replace tvlt's stft * allow alternate window names * replace speecht5 stft * fixup * fix integration tests * fix doc comments * remove manual FFT length calculation * fix docs * go away, deprecation warnings * combine everything into spectrogram function * add deprecated functions back * fixup
36 lines
1.3 KiB
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36 lines
1.3 KiB
Plaintext
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# Utilities for `FeatureExtractors`
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This page lists all the utility functions that can be used by the audio [`FeatureExtractor`] in order to compute special features from a raw audio using common algorithms such as *Short Time Fourier Transform* or *log mel spectrogram*.
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Most of those are only useful if you are studying the code of the audio processors in the library.
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## Audio Transformations
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[[autodoc]] audio_utils.hertz_to_mel
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[[autodoc]] audio_utils.mel_to_hertz
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[[autodoc]] audio_utils.mel_filter_bank
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[[autodoc]] audio_utils.optimal_fft_length
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[[autodoc]] audio_utils.window_function
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[[autodoc]] audio_utils.spectrogram
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[[autodoc]] audio_utils.power_to_db
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[[autodoc]] audio_utils.amplitude_to_db
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