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class:: BPF
summary:: 2nd order Butterworth bandpass filter.
related:: Classes/BRF, Classes/HPF, Classes/LPF
categories:: UGens>Filters>Linear
Description::
A second order band pass filter.
classmethods::
method::ar, kr
argument::in
The input signal.
argument::freq
Centre 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::rq
The reciprocal of Q. Q is conventionally defined as freq / bandwidth, meaning rq = (bandwidth / freq).
argument::mul
argument::add
Examples::
code::
{ BPF.ar(Saw.ar(200,0.5), FSinOsc.kr(XLine.kr(0.7,300,20),0,3600,4000), 0.3) }.play;
{ BPF.ar(Saw.ar(200,0.5), MouseX.kr(100, 10000, 1), 0.3) }.play;
// BPF on control signals:
(
{ var vib = BPF.kr(PinkNoise.kr, MouseX.kr(1, 100, 1), 0.3) * 10;
SinOsc.ar(vib * 200 + 600) * 0.2 }.play;
)
::
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