Filter mcompand
  Multiband Compress or expand audio dynamic range.
    Inputs:
       #0: default (audio)
    Outputs:
       #0: default (audio)
mcompand AVOptions:
  args              <string>     ..F.A.... set parameters for each band (default "0.005,0.1 6 -47/-40,-34/-34,-17/-33 100 | 0.003,0.05 6 -47/-40,-34/-34,-17/-33 400 | 0.000625,0.0125 6 -47/-40,-34/-34,-15/-33 1600 | 0.0001,0.025 6 -47/-40,-34/-34,-31/-31,-0/-30 6400 | 0,0.025 6 -38/-31,-28/-28,-0/-25 22000")


