70 lines
1.3 KiB
Text
70 lines
1.3 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{LFNoise2}
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Quadratic noise.@section{related}
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Classes/LFClipNoise, Classes/LFDClipNoise, Classes/LFDNoise0, Classes/LFDNoise1, Classes/LFDNoise3, Classes/LFNoise0, Classes/LFNoise1
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@section{categories}
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UGens>Generators>Stochastic
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@section{description}
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Generates quadratically interpolated random values at a rate given by
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the nearest integer division of the sample rate by the
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@racketblock[freq:: argument.
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]
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@section{note}
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quadratic interpolation means that the noise values can occasionally extend beyond the normal range of +-1, if the freq varies in certain ways. If this is undesirable then you might like to clip2 the values, or use a linearly-interpolating unit instead.
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::
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@section{classmethods}
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@section{method}
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ar, kr
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@section{argument}
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freq
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Approximate rate at which to generate random values.
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@section{argument}
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mul
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Output will be multiplied by this value.
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@section{argument}
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add
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This value will be added to the output.
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@section{Examples}
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@racketblock[
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{ LFNoise2.ar(1000, 0.25) }.play;
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// modulate frequency
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{ LFNoise2.ar(XLine.kr(1000, 10000, 10), 0.25) }.play;
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// as frequency modulator
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(
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{ SinOsc.ar(
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LFNoise2.ar(4, 400, 450),
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0, 0.2
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)
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}.play;
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)
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// freq is the rate of interpolation points
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{ var freq = 1000; [LFNoise2.ar(freq), Impulse.ar(freq)] }.plot
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::
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]
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