Complex conjugate

Source: FFT.sc

Converts the FFT frames to their complex conjugate (i.e. reverses the sign of their imaginary part). This is not usually a useful audio effect in itself, but may be a component of other analysis or transformation processes...

From superclass: PV_MagSquared

buffer |
FFT chain. |

s.boot; ( b = Buffer.alloc(s,2048,1); c = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav"); d = Buffer.alloc(s,2048,1); ) ( SynthDef(\help_pvconj, { arg out=0, bufnum=0, soundBufnum=2; var in, chain; in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1); chain = FFT(bufnum, in); chain = PV_Conj(chain); // Original is left, conj is right Out.ar(out, 0.3 * [in, IFFT(chain)]); }).play(s,[\out, 0, \bufnum, b, \soundBufnum, c]); ) ( SynthDef(\help_pvconj2, { arg out=0, bufnum=0, soundBufnum=2; var in, chainA, chainB; in = PlayBuf.ar(1, soundBufnum, BufRateScale.kr(soundBufnum), loop: 1); chainA = FFT(bufnum, in); chainB = PV_Copy(chainA, d); chainB = PV_Conj(chainB); // Now we have the original and conjugate, what happens if we add them? Out.ar(out, 0.3 * (IFFT(PV_Add(chainA, chainB)).dup)); }).play(s,[\out, 0, \bufnum, b, \soundBufnum, c]); )

helpfile source: /usr/local/share/SuperCollider/HelpSource/Classes/PV_Conj.schelp

link::Classes/PV_Conj::

link::Classes/PV_Conj::