/usr/share/SuperCollider/HelpSource/Classes/Psetpre.schelp is in supercollider-common 1:3.8.0~repack-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 | class:: Psetpre
summary:: set values of one key in an event before it is passed up
related:: Classes/Pset, Classes/Psetp
categories:: Streams-Patterns-Events>Patterns>Filter
description::
Sets a value in an event, before it is passed up the stream. To set the value after it has been passed to the stream, use link::Classes/Pset::.
code::
(
var a, b;
a = Psetpre(\freq, 801, Pbind(\dur, 0.5));
x = a.asStream;
9.do({ x.next(Event.new).postln; });
)
::
ClassMethods::
method::new
argument::name
the key
argument::value
can be a pattern or a stream. The resulting stream ends when that incoming stream ends.
argument::pattern
the pattern
Examples::
code::
//Psetpre does not override incoming values:
(
var a, b;
a = Psetpre(\freq, 801, Pbind(\freq, 108));
x = a.asStream;
9.do({ x.next(Event.new).postln; });
)
(
var a, b;
a = Psetpre(\freq, Pseq([401, 801], 2), Pbind(\dur, 0.5));
x = a.asStream;
9.do({ x.next(Event.new).postln; });
)
//sound example
(
SynthDef(\sinegrain,
{ arg out=0, freq=440, sustain=0.02;
var env;
env = EnvGen.kr(Env.perc(0.001, sustain), 1, doneAction:2);
Out.ar(out, SinOsc.ar(freq, 0, env * 0.1))
}).add;
)
(
a = Pbind(\dur, 0.5, \instrument, \sinegrain);
a = Psetpre(\freq, Pseq([500, 600, 700], inf), a);
a = Psetpre(\legato, Pseq([0.01, 1],inf), a);
a.play;
)
::
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