de.sciss.synth.ugen

ListTrig2

object ListTrig2 extends Serializable

A UGen that produces a scheduled sequences of trigger impulses. Trigger times are provided as a list (buffer) of relative durations between consecutive events. A trigger is output as a single control period of value 1 , after which output returns to zero.

Examples
// trigger grains
val b = Buffer(s)
b.alloc(11)
b.setData(Vector(1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89).map(_ * 0.1f)) // Fibonacci

val x = play {
  val reset = "reset".tr
  val tr  = ListTrig2.kr(b.id, BufFrames.kr(b.id), reset)
  Timer.kr(tr).poll(tr, "timer")
  val env = EnvGen.ar(Env.perc(0.01, 0.1), gate = tr)
  SinOsc.ar(Seq(440, 460)) * env * 0.2
}

x.set("reset" -> 1)  // start anew
x.free(); b.free()
Note

The argument order is different from its sclang counterpart.

See also

ListTrig2

Dbufrd

DemandEnvGen

Logger

ListTrig

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  14. def kr(buf: GE, size: GE, reset: GE = 0): ListTrig2

    buf

    identifier of the buffer containing the durations for the triggers in seconds. A value represents a relative offsets with respect to its predecessor. The first value indicates the time between the start of the synth or last reset received and the first trigger. The buffer should be monophonic.

    size

    the number of values to use from the buffer. Typically, this should be BufFrames.kr(buf) .

    reset

    resets the timer and begins reading the time deltas again at the start of the buffer.

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