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class:: Pgeom
summary:: geometric series pattern
related:: Classes/Pseries
categories:: Streams-Patterns-Events>Patterns>List
description::
Returns a stream that behaves like a geometric series.
ClassMethods::
method::new
argument::start
start value.
argument::grow
multiplication factor.
argument::length
number of values produced.
Examples::
code::
(
var a;
a = Pgeom(1.0, 1.1, inf);
a.asStream.nextN(100).plot;
)
// sound example
(
SynthDef(\help_sinegrain,
{ arg out=0, freq=440, sustain=0.05, amp=0.1;
var env;
env = EnvGen.kr(Env.perc(0.01, sustain, 0.2, amp), doneAction:2);
Out.ar(out, SinOsc.ar(freq, 0, env))
}).add;
)
(
var a;
a = Pgeom(300, 1.03, 70).asStream;
{
a.do { |val|
Synth(\help_sinegrain, [\freq, val]);
0.02.wait;
}
}.fork;
)
(
Pbind(
\dur, 0.01,
\instrument, \help_sinegrain,
\freq, Pgeom(800, Pbrown(0.99, 1.01, 0.01, inf), inf)
).play;
)
::
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