linux: shared memory interface - link with librt
[supercollider.git] / HelpSource / Classes / LPZ2.schelp
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1 class:: LPZ2
2 summary:: Two zero fixed lowpass
3 related:: Classes/BPZ2, Classes/BRZ2, Classes/HPZ2
4 categories::  UGens>Filters>Linear
7 Description::
9 A special case fixed filter. Implements the formula:
10 formula::
11 out(i) = 0.25 * (in(i) + (2 * in(i - 1)) + in(i - 2)).
15 classmethods::
17 method::ar, kr
19 argument::in
21 The input signal.
24 argument::mul
26 Output will be multiplied by this value.
29 argument::add
31 This value will be added to the output.
34 Examples::
36 code::
37 //Compare:
39 { WhiteNoise.ar(0.25) }.play;
41 { LPZ2.ar(WhiteNoise.ar(0.25)) }.play;