Filter superequalizer
  Apply 18 band equalization filter.
    Inputs:
       #0: default (audio)
    Outputs:
       #0: default (audio)
superequalizer AVOptions:
  1b                <float>      ..F.A.... set 65Hz band gain (from 0 to 20) (default 1)
  2b                <float>      ..F.A.... set 92Hz band gain (from 0 to 20) (default 1)
  3b                <float>      ..F.A.... set 131Hz band gain (from 0 to 20) (default 1)
  4b                <float>      ..F.A.... set 185Hz band gain (from 0 to 20) (default 1)
  5b                <float>      ..F.A.... set 262Hz band gain (from 0 to 20) (default 1)
  6b                <float>      ..F.A.... set 370Hz band gain (from 0 to 20) (default 1)
  7b                <float>      ..F.A.... set 523Hz band gain (from 0 to 20) (default 1)
  8b                <float>      ..F.A.... set 740Hz band gain (from 0 to 20) (default 1)
  9b                <float>      ..F.A.... set 1047Hz band gain (from 0 to 20) (default 1)
  10b               <float>      ..F.A.... set 1480Hz band gain (from 0 to 20) (default 1)
  11b               <float>      ..F.A.... set 2093Hz band gain (from 0 to 20) (default 1)
  12b               <float>      ..F.A.... set 2960Hz band gain (from 0 to 20) (default 1)
  13b               <float>      ..F.A.... set 4186Hz band gain (from 0 to 20) (default 1)
  14b               <float>      ..F.A.... set 5920Hz band gain (from 0 to 20) (default 1)
  15b               <float>      ..F.A.... set 8372Hz band gain (from 0 to 20) (default 1)
  16b               <float>      ..F.A.... set 11840Hz band gain (from 0 to 20) (default 1)
  17b               <float>      ..F.A.... set 16744Hz band gain (from 0 to 20) (default 1)
  18b               <float>      ..F.A.... set 20000Hz band gain (from 0 to 20) (default 1)


