torchaudio.functional.allpass_biquad

torchaudio.functional.allpass_biquad(waveform: Tensor, sample_rate: int, central_freq: float, Q: float = 0.707) → Tensor

Design two-pole all-pass filter. Similar to SoX implementation.

Parameters:

• waveform (torch.Tensor) – audio waveform of dimension of (…, time)

• sample_rate (int) – sampling rate of the waveform, e.g. 44100 (Hz)

• central_freq (float or torch.Tensor) – central frequency (in Hz)

• Q (float or torch.Tensor, optional) – https://en.wikipedia.org/wiki/Q_factor (Default: 0.707)

Returns:

Waveform of dimension of (…, time)

Return type:

Tensor

Reference:

• http://sox.sourceforge.net/sox.html

• https://www.w3.org/2011/audio/audio-eq-cookbook.html#APF