Filter apulsator
  Audio pulsator.
    Inputs:
       #0: default (audio)
    Outputs:
       #0: default (audio)
apulsator AVOptions:
  level_in          <double>     ..F.A.... set input gain (from 0.015625 to 64) (default 1)
  level_out         <double>     ..F.A.... set output gain (from 0.015625 to 64) (default 1)
  mode              <int>        ..F.A.... set mode (from 0 to 4) (default sine)
     sine            0            ..F.A....
     triangle        1            ..F.A....
     square          2            ..F.A....
     sawup           3            ..F.A....
     sawdown         4            ..F.A....
  amount            <double>     ..F.A.... set modulation (from 0 to 1) (default 1)
  offset_l          <double>     ..F.A.... set offset L (from 0 to 1) (default 0)
  offset_r          <double>     ..F.A.... set offset R (from 0 to 1) (default 0.5)
  width             <double>     ..F.A.... set pulse width (from 0 to 2) (default 1)
  timing            <int>        ..F.A.... set timing (from 0 to 2) (default hz)
     bpm             0            ..F.A....
     ms              1            ..F.A....
     hz              2            ..F.A....
  bpm               <double>     ..F.A.... set BPM (from 30 to 300) (default 120)
  ms                <int>        ..F.A.... set ms (from 10 to 2000) (default 500)
  hz                <double>     ..F.A.... set frequency (from 0.01 to 100) (default 2)


