82 lines
2.2 KiB
Text
82 lines
2.2 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{audio_rate_mapping}
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audio mapping in ProxySpace@section{categories}
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Libraries>JITLib>Tutorials
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@racketblock[
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// todo. expand(numChannels) message
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p = ProxySpace.push(s.boot);
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p.fadeTime = 3;
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// some filters
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~f1 = { |a_in=#[0,0], freq=500, dt=0.01| Ringz.ar(a_in, freq, dt) };
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~f2 = { |a_in=#[0,0], dt=0.1| CombL.ar(a_in, 0.5, dt, 15 * dt) };
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~f3 = { |a_in=#[0,0], freq=30| a_in * LFSaw.ar(freq.neg).max(0) };
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// some sources
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~x1 = { LFPulse.kr(SinOsc.kr(0.2).exprange(2, 200)) * PinkNoise.ar(0.5.dup) };
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~x2 = { Dust.ar(SinOsc.kr(0.2, [0, pi]).exprange(2, 2000)) };
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// the output
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~out.play;
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~out = { |a_in=#[0,0]| a_in };
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// some mappings by hand:
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~out.mapn(\a_in, ~x1);
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~out.xmapn(\a_in, ~x2);
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~out.xmapn(\a_in, ~f1); ~f1.xmapn(\a_in, ~x1);
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~out.xmapn(\a_in, ~f2); ~f2.xmapn(\a_in, ~x1);
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~out.xmapn(\a_in, ~f2); ~f2.xmapn(\a_in, ~x1);
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~f2.xset(\dt, 0.01);
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~mx1 = { MouseX.kr(0.0001, 1, 1) };
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~f2.xmap(\dt, ~mx1);
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~out.xmapn(\a_in, ~f3); ~f3.xmapn(\a_in, ~f2); ~f2.xmapn(\a_in, ~x1);
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// this should maybe be:
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// ~f2 --(\a_in)--> ~f3 --(\a_in)--> ~out
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~mx1 = { LFNoise1.kr(0.1).exprange(0.0001, 1) };
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~mF = { ~mx1.kr.linexp(0, 1, 1, 10000) };
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~f3.xmap(\freq, ~mF);
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~f1.mapn(\a_in, ~x2);
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~f2.xmapn(\a_in, ~f1);
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~f1.xmapn(\freq, ~mF, \dt, ~mx1);
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~x2 = { Impulse.ar(SinOsc.kr(0.2, [0, pi]).exprange(2, 200)) };
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~x1 = { Saw.ar(20, 0.5.dup) * ~x2.ar };
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~out = ~x1;
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// possible schema:
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/*
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px.map knows always already the number of channels of a proxy, so can decide whether
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to use map or mapn. (map always would mean flat mapping).
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px.mapn could do tricky things like:
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px.mapn(\a_in2, [mono1, mono2])
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px.mapn(\a_in2, stereo) would still work
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px.mapn(\a_in2, [stereo, mono]) could use the first of the stereo chans and the mono
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how to get at the second arg of the stereo in? or it could mix/wrap.
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--> px.mapn([\a_inx, \a_iny], stereo)
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px.mapn(\a_in, stereo) would take the first of the stereo channels
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px.map(\a_in, stereo) would use the first of the stereo channels
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px.mapn(\a_in, [mono, mono]) would use the first channel
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mappings could be saved as is and if the proxy rebuilds with a different channel size, it would unfold?
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*/
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::
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]
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