f4exb/dsdcc

Highpass filter for mbelib audio

f4exb opened this issue · 1 comments

f4exb commented

It appears that audio processed through mbelib leaves undesirable low frequency components. The voice understanding can be improved with a high pass telephone type (> 300Hz) filter.

In fact the IIR filter used in the interpolator cat be set to be either lowpass therefore without this additional filter or bandpass therefore with the additional filter. It is just a matter of coefficients that can be calculated with Python scipy.

f4exb commented

Implemented in v1.7.3