Filter speechnorm
  Speech Normalizer.
    Inputs:
       #0: default (audio)
    Outputs:
       #0: default (audio)
speechnorm AVOptions:
  peak              <double>     ..F.A....T set the peak value (from 0 to 1) (default 0.95)
  p                 <double>     ..F.A....T set the peak value (from 0 to 1) (default 0.95)
  expansion         <double>     ..F.A....T set the max expansion factor (from 1 to 50) (default 2)
  e                 <double>     ..F.A....T set the max expansion factor (from 1 to 50) (default 2)
  compression       <double>     ..F.A....T set the max compression factor (from 1 to 50) (default 2)
  c                 <double>     ..F.A....T set the max compression factor (from 1 to 50) (default 2)
  threshold         <double>     ..F.A....T set the threshold value (from 0 to 1) (default 0)
  t                 <double>     ..F.A....T set the threshold value (from 0 to 1) (default 0)
  raise             <double>     ..F.A....T set the expansion raising amount (from 0 to 1) (default 0.001)
  r                 <double>     ..F.A....T set the expansion raising amount (from 0 to 1) (default 0.001)
  fall              <double>     ..F.A....T set the compression raising amount (from 0 to 1) (default 0.001)
  f                 <double>     ..F.A....T set the compression raising amount (from 0 to 1) (default 0.001)
  channels          <channel_layout> ..F.A....T set channels to filter (default 0xffffffffffffffff)
  h                 <channel_layout> ..F.A....T set channels to filter (default 0xffffffffffffffff)
  invert            <boolean>    ..F.A....T set inverted filtering (default false)
  i                 <boolean>    ..F.A....T set inverted filtering (default false)
  link              <boolean>    ..F.A....T set linked channels filtering (default false)
  l                 <boolean>    ..F.A....T set linked channels filtering (default false)


