129 lines
3 KiB
Text
129 lines
3 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{Pgpar}
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embed event streams in parallel and put each in its own group@section{related}
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Classes/Ppar, Classes/Pbus, Classes/Pgroup
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@section{categories}
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Streams-Patterns-Events>Patterns>Parallel
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@section{description}
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Embeds several event streams so that they form a single output stream with all their events in temporal order. When one stream ends, the other streams are further embedded until all have ended.
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@section{note}
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In order to fully separate these layers from other synths, use link::Classes/Pbus::.
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::
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See link::Classes/Pgroup:: for a description of the
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@racketblock[\groupReleaseTime:: event key.
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]
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@section{ClassMethods}
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@section{method}
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new
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@section{argument}
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list
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list of patterns or streams.
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@section{argument}
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repeats
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repeat the whole pattern n times.
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@section{Examples}
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@racketblock[
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// an example analogous to the one in the Pfx helpfile
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(
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SynthDef(\echo, { arg out=0, maxdtime=0.2, dtime=0.2, decay=2, gate=1;
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var env, in;
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env = Linen.kr(gate, 0.05, 1, 0.1, 2);
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in = In.ar(out, 2);
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XOut.ar(out, env, CombL.ar(in * env, maxdtime, dtime, decay, 1, in));
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}, [\ir, \ir, 0.1, 0.1, 0]).add;
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SynthDef(\distort, { arg out=0, pregain=40, amp=0.2, gate=1;
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var env;
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env = Linen.kr(gate, 0.05, 1, 0.1, 2);
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XOut.ar(out, env, (In.ar(out, 2) * pregain).distort * amp);
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}, [\ir, 0.1, 0.1, 0]).add;
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SynthDef(\wah, { arg out=0, gate=1, rate=0.3;
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var env, in;
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env = Linen.kr(gate, 0.05, 1, 0.4, 2);
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in = In.ar(out, 2);
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XOut.ar(out, env, RLPF.ar(in, LinExp.kr(LFNoise1.kr(rate), -1, 1, 200, 8000), 0.1).softclip * 0.8);
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}, [\ir, 0]).add;
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)
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// watch the node structure as it changes
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s.waitForBoot({ s.plotTree });
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(
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var p, q, r, o;
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Pbus(
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Pgpar([
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Pbind(\degree, Prand((0..7), inf), \dur, 0.3, \legato, 0.2),
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Pbind(\instrument, \echo, \dur, 3, \legato, 1.1,
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\dtime, Pwhite(0.01, 0.1, inf), \decay, 3),
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Pbind(\instrument, \distort, \dur, 1.2, \legato, 1.1,
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\pregain, Pwhite(1, 20, inf), \amp, 0.25),
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Pbind(\instrument, \wah, \dur, 4.0, \legato, 1.1,
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\rate, Pwhite(0.1, 3, inf))
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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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@racketblock[
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// synthdefs
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(
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SynthDef(\gap, { arg out, sustain=1.0, attack=0.0001, decay=0.01, leak;
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var level;
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level = EnvGen.ar(Env.linen(attack, sustain, decay, 1-leak), doneAction: Done.freeSelf);
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XOut.ar(out, level, Silent.ar ! 2)
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}).add;
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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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// play a layered pattern with gaps and overlays
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(
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x = Pbind(
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\instrument, \help_sinegrain,
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\degree, Pn(Plazy({ Prand([0, 4, 5], 16) + 5.rand })) + Prand(#[0, [0, 3], [0, 7]], inf),
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\dur, Prand([0.25, 0.5, 1.0], inf),
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\scale, #[0, 3, 5, 9, 10]
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);
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y = Pbind(
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\instrument, \gap,
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\dur, Prand([0.25, 0.5, 1.0], inf) * Pstutter(inf, Prand([0.25, 1, 2],1)),
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\legato, Prand([0.25, 0.5, 1.0], inf),
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\leak, 0.25
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);
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a = Pbus(Pgpar([x, y, x, y, x, y]));
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a.play;
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)
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::
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]
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