FreqShift : UGen : AbstractFunction : Object

Description

FreqShift implements single sideband amplitude modulation, also known as frequency shifting, but not to be confused with pitch shifting. Frequency shifting moves all the components of a signal by a fixed amount but does not preserve the original harmonic relationships.

Class Methods

FreqShift.ar(in, freq: 0.0, phase: 0.0, mul: 1.0, add: 0.0)

Inherited class methods

Instance Methods

Inherited instance methods

Examples

More Examples

send a SynthDef, run the routine then send a different SynthDef// simple detune & pitchmod via FreqShift ( SynthDef(\frqShift1, { |out, freq, detune=1.5| var e1, left, right; e1 = EnvGen.ar(Env.new([0, 0.1, 0], [1, 2.3]),1, doneAction: Done.freeSelf); left = SinOsc.ar(freq, 0, e1); // original tone left = left + FreqShift.ar(left, freq * detune); // shift and add back to original right = FreqShift.ar(left, SinOsc.kr(3.23, 0, 5)); Out.ar(out, [left,right] * 0.1); }).add; ) // the routine ( r = Routine({ var table,pitch; table = [0,2,4,5,7,9,11,12]; inf.do { pitch = (48+(12*2.rand) + table.choose).midicps; Synth.grain(\frqShift1, [\freq, pitch]); 3.wait; }; }).play; ) // shift pulse wave in opposite directions ( SynthDef(\frqShift1, { |out, freq, detune=0.15| var e1, snd, left, right; e1 = EnvGen.ar(Env.new([0, 1, 0],[0.02, 3.2]), 1, doneAction: Done.freeSelf); snd = Pulse.ar(freq, SinOsc.kr(2.3).range(0.2,0.8), e1); // original tone left = FreqShift.ar(snd,XLine.kr(-0.1,-200,2)); // shift and add back to original right = FreqShift.ar(snd,XLine.kr(0.1,200,2)); Out.ar(out, [left, right] * 0.1); }).add ) // FreqShift >> feedback >>> FreqShiftc ( SynthDef("frqShift1", { |out, freq| var e1,snd,snd2,in; in = FreqShift.ar(InFeedback.ar(0, 1) * 3.2, XLine.ar(0.01, freq * 1.5, 1)); // shift the feedback e1 = Env.new([0, 0.1, 0], [0.02, 2.98]); snd = SinOsc.ar(freq, 0, EnvGen.ar(e1, 1, doneAction: Done.freeSelf)); snd2 = FreqShift.ar(snd+in, SinOsc.ar(4.24, 0.5, 3), 0, 0.5); // subtle modulating shift OffsetOut.ar(0, Limiter.ar(snd2 + snd * 0.5, 1, 0.005) ! 2); }).add; ) // ssllooww columbia tuned shift detune ( r.stop; // stop old routine Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav", bufnum:99); SynthDef(\frqShift1, { |out, freq, bufnum| var e1,snd,left,right; e1 = Env.new([0,1,0], [3,1], -4); snd = PlayBuf.ar(1, bufnum, BufRateScale.kr(bufnum) * 0.01, loop:1); // subtle shift of the output left = FreqShift.ar(snd, freq * 2, 0, EnvGen.ar(e1, 1, doneAction: Done.freeSelf)); right = FreqShift.ar(snd, freq * 3, 0, EnvGen.ar(e1, 1, doneAction: Done.freeSelf)); Out.ar(out, [left, right] * 3); }).add; ) // the routine ( r = Routine({ var table, pitch; table = [0,2,4,5,7,9,11,12]; inf.do{ pitch = (48+(12*2.rand) + table.choose).midicps; s.sendMsg(\s_new, \frqShift1, -1, 1, 1, \freq, pitch, \bufnum, 99); 3.wait; }; }).play )