71 lines
1 KiB
Text
71 lines
1 KiB
Text
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#lang scribble/manual
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@(require (for-label racket))
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@title{LPF}
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2nd order Butterworth lowpass filter@section{related}
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Classes/BPF, Classes/BRF, Classes/HPF
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@section{categories}
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UGens>Filters>Linear
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@section{description}
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A second order low pass filter.
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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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The input signal.
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@section{argument}
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freq
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Cutoff frequency in Hertz.
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WARNING: due to the nature of its implementation frequency values close to 0 may cause glitches and/or extremely loud audio artifacts!
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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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{ LPF.ar(Saw.ar(200,0.1), SinOsc.kr(XLine.kr(0.7,300,20),0,3600,4000)) }.play;
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// kr:
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(
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{ var ctl = LPF.kr(LFPulse.kr(8), SinOsc.kr(XLine.kr(1, 30, 5)) + 2);
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SinOsc.ar(ctl * 200 + 400)
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}.play;
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)
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(
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{ var ctl = LPF.kr(LFPulse.kr(8), MouseX.kr(2, 50, 1));
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SinOsc.ar(ctl * 200 + 400)
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}.play;
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)
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::
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]
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