Cut subwoofer frequencies.

This filter allows to set custom, steeper roll off than highpass filter, and thus is able to more attenuate frequency content in stop-band.

The filter accepts the following options:

cutoff

Set cutoff frequency in Hertz. Allowed range is 2 to 200. Default value is 20.

order

Set filter order. Available values are from 3 to 20. Default value is 10.

level

Set input gain level. Allowed range is from 0 to 1. Default value is 1.