80 lines
1.7 KiB
Text
80 lines
1.7 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{IEnvGen}
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Envelope generator for polling values from an Env@section{categories}
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UGens>Envelopes
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@section{related}
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Classes/Env
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@section{description}
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Envelope generator for polling values from an envelope. IEnvGen plays back break point envelopes from the
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@racketblock[index:: point. The envelopes are instances of the link::Classes/Env:: class.
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]
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@section{classmethods}
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@section{private}
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categories, new1
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@section{method}
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ar, kr
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@section{argument}
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envelope
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an instance of Env (this is static for the life of the UGen)
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@section{argument}
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index
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a point to access within the Env
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@section{argument}
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mul
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@section{argument}
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add
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@section{instancemethods}
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@section{private}
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init, argNamesInputsOffset, convertEnv
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@section{examples}
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@racketblock[
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(
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{
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var env = Env([0, 0.6, 0.3, 1.0, 0], [0.1, 0.02, 0.4, 1.1], [\lin, \exp, -6, \sin]);
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var envgen = IEnvGen.kr(env, MouseX.kr(0, env.times.sum));
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env.plot;
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SinOsc.ar(envgen * 500 + 440)
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}.play;
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)
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// index with an SinOsc ... mouse controls amplitude of SinOsc
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// use offset so negative values of SinOsc will map into the Env
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(
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{
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var sin = SinOsc.ar(440, 0, MouseX.kr(0, 1));
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// use offset so negative values of SinOsc will map into the Env
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var env = Env([-1, -0.7, 0.7, 1], [ 0.8666, 0.2666, 0.8668 ], \lin, offset: -1.0);
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IEnvGen.ar(env, sin) * 0.1
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}.play;
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)
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// index with Amplitude of input, control freq of SinOsc (uses SoundIn)
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(
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{
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var point = Amplitude.ar(SoundIn.ar(0), 0.01, 0.2);
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// use offset so negative values of SinOsc will map into the Env
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var env = Env.xyc([[0, 330, \exp], [0.5, 440, \exp], [1.0, 1760]]);
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SinOsc.ar(IEnvGen.kr(env, point)) * 0.2
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}.play;
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)
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::
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]
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