object PV_ConformalMap extends ProductReader[PV_ConformalMap] with Serializable
A UGen that applies the conformal mapping z => (z - a) / (1 - za*) to its
input FFT bins z .
It makes a transformation of the complex plane so the output is full of phase
vocoder artifacts but may be musically interesting. One should usually keep
|a| < 1 , although bigger values may be used to produce noise. A value of
a = 0 gives back the input mostly unperturbed.
Examples
// mouse control play { val sf = Seq.fill(3)(Rand(0.1, 0.5)) val sadd = Seq(1, 1.1, 1.5, 1.78, 2.45, 6.7).map(_ * 220) val in = Mix(LFSaw.ar(SinOsc.kr(sf).mulAdd(10, sadd)) * 0.3) val fft = FFT(LocalBuf(2048), in) val re = MouseX.kr(0.01, 2.0, 1) val im = MouseY.kr(0.01, 10.0, 1) val pv = PV_ConformalMap(fft, re, im) val out = IFFT.ar(pv) val vrb = CombN.ar(out, 0.1, 0.1, 10) Pan2.ar(out + vrb * 0.5, 0, 0.3) }
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