IEnvGenTest.scala

play {
  val env = IEnvGen.kr(IEnv(0, Env.Seg(3, 1, linShape) :: Nil, 0), MouseX.kr(0,1))
  env.poll(1)
}

/////////


def test(off: Double, dur: Double, fadeIn: Double, fadeOut: Double) {
  val x = gui {
    val phase = Line.ar(off, dur, dur - off, doneAction = freeSelf)
    val env = IEnvGen.ar(IEnv(0, 
      Env.Seg(fadeIn, 1, linShape) :: 
      Env.Seg(dur - (fadeIn + fadeOut), 1, stepShape) :: 
      Env.Seg(fadeOut, 0, linShape) :: Nil, 0), phase)
    env * SinOsc.ar(SampleRate.ir/4)
  }
  x.waveform(duration = dur)
}

test(off = 0, dur = 4, fadeIn = 1.5, fadeOut = 0.5)
test(off = 1, dur = 4, fadeIn = 1.5, fadeOut = 0.5)
test(off = 3.75, dur = 4, fadeIn = 1.5, fadeOut = 0.5)


//////// meaning of offset:

def test(off: Double, dur: Double, fadeIn: Double, fadeOut: Double) {
  val x = gui {
    val phase = Line.ar(off, dur, dur - off, doneAction = freeSelf)
      val env = IEnvGen.ar(IEnv(1, 
      Env.Seg(fadeOut, 0, linShape) :: Nil, dur - fadeOut), phase)
    env * SinOsc.ar(SampleRate.ir/4)
  }
  x.waveform(duration = dur)
}