52 lines
934 B
Text
52 lines
934 B
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{Slope}
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Slope of signal@section{categories}
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UGens>Analysis, UGens>Filters>Linear, UGens>Maths
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@section{description}
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Measures the rate of change per second of a signal.
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Formula implemented is:
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@racketblock[
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out[i] = (in[i] - in[i-1]) * sampling_rate
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::
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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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in
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Input signal to measure.
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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{examples}
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@racketblock[
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(
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{
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var a, b, c, scale;
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a = LFNoise2.ar(2000); // quadratic noise
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b = Slope.ar(a); // first derivative produces line segments
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c = Slope.ar(b); // second derivative produces constant segments
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scale = 0.0002; // needed to scale back to +/- 1.0
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[a, b * scale, c * scale.squared]
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}.plot
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)
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::
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For another example of Slope see link::Classes/AbstractFunction#hypot#AbstractFunction:hypot::.
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]
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