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class:: LPF
summary:: 2nd order Butterworth lowpass filter
related:: Classes/BPF, Classes/BRF, Classes/HPF
categories:: UGens>Filters>Linear
Description::
A second order low pass filter.
classmethods::
method::ar, kr
argument::in
The input signal.
argument::freq
Cutoff frequency in Hertz.
WARNING: due to the nature of its implementation frequency values close to 0 may cause glitches and/or extremely loud audio artifacts!
argument::mul
Output will be multiplied by this value.
argument::add
This value will be added to the output.
Examples::
code::
{ LPF.ar(Saw.ar(200,0.1), SinOsc.kr(XLine.kr(0.7,300,20),0,3600,4000)) }.play;
// kr:
(
{ var ctl = LPF.kr(LFPulse.kr(8), SinOsc.kr(XLine.kr(1, 30, 5)) + 2);
SinOsc.ar(ctl * 200 + 400)
}.play;
)
(
{ var ctl = LPF.kr(LFPulse.kr(8), MouseX.kr(2, 50, 1));
SinOsc.ar(ctl * 200 + 400)
}.play;
)
::
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