How to create audio bandpass?

[NOYB]

Trying to create a bandpass with parametric eq command line (sout transcode).

Code: Select all

--param-eq-lowf=200 --param-eq-lowgain=-20

seems to work as expected. Cutting below 200 Hz.

Code: Select all

--param-eq-highf=3500 --param-eq-highgain=-20

seems to cut below 3500 Hz. Was expecting to cut above the set frequency (3500 Hz).

Was expecting lowf to set the lowest passed frequency and highf to set the highest passed frequency. Thus creating a bandpass.

So how then can I create a 200 Hz to 3500 Hz bandpass?

Code: Select all

transcode{afilter=param_eq,

VLC 3.0.20 Vetinari