86 lines
1 KiB
Text
86 lines
1 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{Schmidt}
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Schmidt trigger.@section{related}
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Classes/InRange, Classes/InRect
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@section{categories}
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UGens>Maths
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@section{description}
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If
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@racketblock[in > hi::, output 1. If ]
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@racketblock[in < lo::, output 0. Otherwise, repeat the
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last sample of output, assumed to be 0 at initialization. In sclang-flavored
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pseudocode:
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]
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@racketblock[
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out[i] = if(in[i] < lo[i]) {
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0
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} {
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if(in[i] > hi[i]) {
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1
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} {
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out[i-1]
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}
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};
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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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Signal to be tested.
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@section{argument}
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lo
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Low threshold.
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@section{argument}
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hi
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High threshold.
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@section{Examples}
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@racketblock[
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s.boot;
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{ Schmidt.kr(SinOsc.kr(1, 0, 0.2), -0.15, 0.15)}.scope; // see the trigger
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{ Schmidt.kr(MouseX.kr(0, 1), 0.2, 0.8)}.scope; // try it with the cursor
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// threshold octave jumps
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(
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{
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var in = LFNoise1.kr(3);
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var octave = Schmidt.kr(in, -0.15, 0.15) + 1;
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SinOsc.ar(in * 200 + 500 * octave, 0, 0.1)
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}.scope;
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)
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::
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]
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