function Env(t1, l1, t2, l2, t3, l3) {
    Env_classCallCheck(this, Env);
    console.warn('WARNING: p5.Env is now deprecated and may be removed in future versions. ' + 'Please use the new p5.Envelope instead.');
    return _super.call(this, t1, l1, t2, l2, t3, l3);
  }
Set the output level of the gain node.

 @method  amp
 @for p5.Gain
 @param  {Number} volume amplitude between 0 and 1.0
 @param  {Number} [rampTime] create a fade that lasts rampTime
 @param  {Number} [timeFromNow] schedule this event to happen
                               seconds from now