Classes | UGens > Filters > Linear

BPF : Filter : PureUGen : UGen : AbstractFunction : Object

2nd order Butterworth bandpass filter.
Source: Filter.sc
Subclasses: BRF

Description

A second order band pass filter.

Class Methods

BPF.ar(in: 0, freq: 440, rq: 1, mul: 1, add: 0)

BPF.kr(in: 0, freq: 440, rq: 1, mul: 1, add: 0)

Arguments:

in

The input signal.

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!

rq

The reciprocal of Q. Q is conventionally defined as cutoffFreq / bandwidth, meaning rq = (bandwidth / cutoffFreq).

mul
add

Inherited class methods

Instance Methods

Inherited instance methods

Examples

{ 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;
)