A UGen that delays the input by 2 audio frames or control periods.
For audio-rate signals the delay is 2 audio frames, and for control-rate
signals the delay is 2 control periods.
Warning: the The first value output is zero, while both the second and the
third value output equal the first input value! In this respect the UGen behaves
different than DelayN .
// high-frequency comb filter
val z = PinkNoise.ar
val x = z - Delay2.ar(z)
// mouse button to compare dry/wet
LinXFade2.ar(z, x, MouseButton.kr(-1, 1))
input to be delayed