64 lines
1.4 KiB
Racket
64 lines
1.4 KiB
Racket
#lang scribble/manual
|
|
@(require (for-label racket))
|
|
|
|
@title{Pconst}
|
|
constrain the sum of a value pattern@section{related}
|
|
Classes/Pfindur, Classes/Pfin, Classes/Pfinval
|
|
@section{categories}
|
|
Streams-Patterns-Events>Patterns>Repetition
|
|
|
|
@section{description}
|
|
|
|
|
|
Similar to link::Classes/Pfindur::, but works with the value directly.
|
|
|
|
@section{note}
|
|
|
|
Be careful if this is used, directly or indirectly, for a note-length parameter! The difference may be very small and this could result in zombie nodes, due to a bug in link::Classes/EnvGen:: for very short sustain times.
|
|
::
|
|
|
|
@section{ClassMethods}
|
|
|
|
|
|
@section{method}
|
|
new
|
|
Embeds elements of the strong::pattern:: into the stream until the sum comes close enough to strong::sum::. At that point, the difference between the specified sum and the actual running sum is embedded.
|
|
|
|
@section{Examples}
|
|
|
|
|
|
|
|
@racketblock[
|
|
(
|
|
var a, x;
|
|
a = Pconst(5, Prand([1, 2, 0.5, 0.1], inf));
|
|
x = a.asStream;
|
|
9.do({ x.next(Event.default).postln; });
|
|
)
|
|
|
|
|
|
//Pconst 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;
|
|
)
|
|
|
|
(
|
|
Pn(
|
|
Pbind(
|
|
\dur, Pconst(1, Prand([1, 0.02, 0.2], inf)),
|
|
\instrument, \help_sinegrain,
|
|
\degree, Pseries(0, 1, inf),
|
|
\octave, 6
|
|
)
|
|
).play;
|
|
)
|
|
::
|
|
]
|
|
|
|
|