60 lines
1.2 KiB
Text
60 lines
1.2 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{Pswitch}
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embed values in a list according to a pattern of indices@section{related}
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Classes/Pswitch1
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@section{categories}
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Streams-Patterns-Events>Patterns>List>Indexing
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@section{ClassMethods}
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@section{method}
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new
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Pswitch chooses elements from the strong@section{list}
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by a stream of indices ( strong::which:: ) and embeds them in the stream. If the element is itself a pattern, it first completely embeds it before looking for the next index.
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@section{Examples}
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@racketblock[
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(
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var a, b;
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a = Pseq([1, 2, 3], 2);
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b = Pseq([65, 76]);
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c = Pswitch([a, b, 800], Pseq([2, 2, 0, 1], inf));
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x = c.asStream;
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24.do({ x.next.postln; });
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)
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//Pswitch used as a sequence of pitches:
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(
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SynthDef(\help_sinegrain,
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{ arg out=0, freq=440, sustain=0.05;
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var env;
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env = EnvGen.kr(Env.perc(0.01, sustain, 0.2), doneAction: Done.freeSelf);
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Out.ar(out, SinOsc.ar(freq, 0, env))
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}).add;
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)
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(
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a = Pseq([73, 71, 69], 2);
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b = Pseq([0, 0, 0, 4, 0]+64);
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c = Pswitch([a, b, 75], Pseq([2, 2, 0, 1], inf));
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x = c.asStream;
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Routine({
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loop({
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Synth(\help_sinegrain, [\freq, x.next.midicps]);
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0.18.wait;
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})
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}).play;
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)
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::
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]
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