Filter sidechaincompress
  Sidechain compressor.
    Inputs:
       #0: main (audio)
       #1: sidechain (audio)
    Outputs:
       #0: default (audio)
sidechaincompress AVOptions:
  level_in          <double>     ..F.A.... set input gain (from 0.015625 to 64) (default 1)
  mode              <int>        ..F.A.... set mode (from 0 to 1) (default downward)
     downward        0            ..F.A....
     upward          1            ..F.A....
  threshold         <double>     ..F.A.... set threshold (from 0.000976563 to 1) (default 0.125)
  ratio             <double>     ..F.A.... set ratio (from 1 to 20) (default 2)
  attack            <double>     ..F.A.... set attack (from 0.01 to 2000) (default 20)
  release           <double>     ..F.A.... set release (from 0.01 to 9000) (default 250)
  makeup            <double>     ..F.A.... set make up gain (from 1 to 64) (default 1)
  knee              <double>     ..F.A.... set knee (from 1 to 8) (default 2.82843)
  link              <int>        ..F.A.... set link type (from 0 to 1) (default average)
     average         0            ..F.A....
     maximum         1            ..F.A....
  detection         <int>        ..F.A.... set detection (from 0 to 1) (default rms)
     peak            0            ..F.A....
     rms             1            ..F.A....
  level_sc          <double>     ..F.A.... set sidechain gain (from 0.015625 to 64) (default 1)
  mix               <double>     ..F.A.... set mix (from 0 to 1) (default 1)


