81 lines
1.2 KiB
Text
81 lines
1.2 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{RunningSum}
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Running sum over n frames@section{categories}
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UGens>Analysis, UGens>Maths
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@section{description}
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A running sum over a user specified number of samples, useful for running RMS power windowing.
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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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in
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Input signal
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@section{argument}
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numsamp
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How many samples to take the running sum over (initialisation time only, not modulatable. default: 40)
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@section{examples}
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@racketblock[
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// distorts of course - would need scaling
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{ RunningSum.ar(SoundIn.ar) }.play
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// Running Average over x samples
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(
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{
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var x = 100;
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RunningSum.ar(LFSaw.ar, x) * (x.reciprocal)
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}.play
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)
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::
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]
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@racketblock[
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// RMS Power
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(
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{
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var input, numsamp;
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input = LFSaw.ar;
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numsamp = 30;
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(RunningSum.ar(input.squared, numsamp) / numsamp).sqrt
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}.play
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)
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::
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]
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@racketblock[
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// shortcut in class
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{ RunningSum.rms(SoundIn.ar) }.play
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::
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]
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@racketblock[
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// play around
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(
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{
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var input, numsamp, power;
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numsamp = 500;
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input = SoundIn.ar;
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power = MouseX.kr(0.1, 4);
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(RunningSum.ar(input ** power, numsamp)/numsamp) ** (power.reciprocal)
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}.play
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)
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::
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]
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