A UGen that delays the input by 1 audio frame or control period.
For audio-rate signals the delay is 1 audio frame, and for control-rate signals
the delay is 1 control period.
Note: The first value output is not zero but the same as the first input
value! In this respect the UGen behaves different than DelayN .
// analog to HPZ1
val z = PinkNoise.ar
val x = z - Delay1.ar(z)
// mouse button to compare dry/wet
LinXFade2.ar(z, x, MouseButton.kr(-1, 1))
input to be delayed