Audio

utils/audio

Helper module for audio processing.

These functions and classes are only used internally, meaning an end-user shouldn’t need to access anything here.

• utils/audio

  • .read_audio(url, sampling_rate) ⇒ Promise.<Float32Array>

    • ~audio : Float32Array

  • .getMelFilters(sr, n_fft, n_mels) ⇒ Array.<Array<number>>

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utils/audio.read_audio(url, sampling_rate) ⇒ <code> Promise. < Float32Array > </code>

Helper function to read audio from a path/URL.

Kind: static method of utils/audio Returns: Promise.<Float32Array> - The decoded audio as a Float32Array.

Param	Type	Description
url	string | URL	The path/URL to load the audio from.
sampling_rate	number	The sampling rate to use when decoding the audio.

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read_audio~audio : <code> Float32Array </code>

Kind: inner property of read_audio

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utils/audio.getMelFilters(sr, n_fft, n_mels) ⇒ <code> Array. < Array < number > > </code>

Creates a frequency bin conversion matrix used to obtain a mel spectrogram.

Kind: static method of utils/audio Returns: Array.<Array<number>> - Projection matrix to go from a spectrogram to a mel spectrogram.

Param	Type	Description
sr	number	Sample rate of the audio waveform.
n_fft	number	Number of frequencies used to compute the spectrogram (should be the same as in stft).
n_mels	number	Number of mel filters to generate.