72 lines
1.4 KiB
Racket
72 lines
1.4 KiB
Racket
#lang scribble/manual
|
|
@(require (for-label racket))
|
|
|
|
@title{Pfin}
|
|
limit number of events embedded in a stream@section{related}
|
|
Classes/Pfinval, Classes/Pfindur, Classes/Pconst
|
|
@section{categories}
|
|
Streams-Patterns-Events>Patterns>Repetition
|
|
|
|
@section{description}
|
|
|
|
|
|
Limits the number of output values from the given pattern or stream. If the stream is able to output more values, Pfin will terminate it early.
|
|
|
|
The number may be given as a constant, or calculated on the fly from a function or stream. See the "sequence of pitches" example below.
|
|
|
|
@section{ClassMethods}
|
|
|
|
|
|
@section{method}
|
|
new
|
|
embeds strong::count:: elements of the strong::pattern:: into the stream.
|
|
|
|
@section{Examples}
|
|
|
|
|
|
|
|
@racketblock[
|
|
(
|
|
var a, b;
|
|
a = Pfin(5, Pseq(#[1, 2, 3],inf));
|
|
b = a.asStream;
|
|
9.do({ b.next.postln; });
|
|
)
|
|
|
|
|
|
//Pfin used as a sequence of pitches
|
|
|
|
(
|
|
SynthDef(\help_sinegrain,
|
|
{ arg out=0, freq=440, sustain=0.05;
|
|
var env;
|
|
env = EnvGen.kr(Env.perc(0.01, sustain, 0.2), doneAction: Done.freeSelf);
|
|
Out.ar(out, SinOsc.ar(freq, 0, env))
|
|
}).add;
|
|
)
|
|
|
|
(
|
|
var c, b;
|
|
c = Pn(Pfin({ rrand(3, 5) }, Pseq([1, 2, 3, 4, 5, 6], inf) * 4 + 65), inf);
|
|
b = c.asStream;
|
|
Routine({
|
|
loop({
|
|
Synth(\help_sinegrain, [\freq, b.next.midicps]);
|
|
0.12.wait;
|
|
})
|
|
}).play;
|
|
)
|
|
|
|
// or, more concisely:
|
|
|
|
p = Pbind(
|
|
\instrument, \help_sinegrain,
|
|
\midinote, Pn(Pfin({ rrand(3, 5) }, Pseq([1, 2, 3, 4, 5, 6], inf) * 4 + 65), inf),
|
|
\dur, 0.12
|
|
).play;
|
|
|
|
p.stop;
|
|
::
|
|
]
|
|
|
|
|