process(src, seconds, decayRate, reverse) {
    src.connect(this.input);
    this.set(seconds, decayRate, reverse);
  }
Connect a source to the reverb, and assign reverb parameters.

 @method  process
 @for p5.Reverb
 @param  {Object} src     p5.sound / Web Audio object with a sound
                          output.
 @param  {Number} [seconds] Duration of the reverb, in seconds.
                          Min: 0, Max: 10. Defaults to 3.
 @param  {Number} [decayRate] Percentage of decay with each echo.
                           Min: 0, Max: 100. Defaults to 2.
 @param  {Boolean} [reverse] Play the reverb backwards or forwards.