functional_deemph_biquad.RdApply ISO 908 CD de-emphasis (shelving) IIR filter. Similar to SoX implementation.
functional_deemph_biquad(waveform, sample_rate)(Tensor): audio waveform of dimension of (..., time)
(int): sampling rate of the waveform, Allowed sample rate 44100 or 48000
Tensor: Waveform of dimension of (..., time)