torchaudio.functional.biquad

torchaudio.functional.biquad(waveform: Tensor, b0: float, b1: float, b2: float, a0: float, a1: float, a2: float) → Tensor

Perform a biquad filter of input tensor. Initial conditions set to 0.

Parameters:

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

• b0 (float or torch.Tensor) – numerator coefficient of current input, x[n]

• b1 (float or torch.Tensor) – numerator coefficient of input one time step ago x[n-1]

• b2 (float or torch.Tensor) – numerator coefficient of input two time steps ago x[n-2]

• a0 (float or torch.Tensor) – denominator coefficient of current output y[n], typically 1

• a1 (float or torch.Tensor) – denominator coefficient of current output y[n-1]

• a2 (float or torch.Tensor) – denominator coefficient of current output y[n-2]

Returns:

Waveform with dimension of (…, time)

Return type:

Tensor

Reference:

• https://en.wikipedia.org/wiki/Digital_biquad_filter