RandID

A UGen that determines which random number generator is used for the enclosing synth. All synths that use the same generator reproduce the same sequence of numbers when the same seed is set again.

===Examples===

// button alternatingly resets left and right seed
0 to 1 map { i =>
 play {
   RandID.ir(i)
   val x     = Impulse.kr(4)
   val pch   = TIRand.kr(40, 100, x)
   val b     = MouseButton.kr(lag = 0)
   val tr    = PulseDivider.kr(b, 2, i)
   pch.poll(x, if (i == 0) "left " else "right")
   RandSeed.kr(tr + Impulse.kr(0), 234)
   Out.ar(i, SinOsc.ar(pch.midiCps) * 0.2)
 }
}