sclang: ServerShmInterface - try to avoid multiple destructor calls
[supercollider.git] / HelpSource / Classes / BPZ2.schelp
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1 class:: BPZ2
2 summary:: Two zero fixed midpass.
3 related:: Classes/BRZ2, Classes/HPZ2, Classes/LPZ2
4 categories::  UGens>Filters>Linear
7 Description::
9 A special case fixed filter. Implements the formula:
11 formula::
12 out(i) = 0.5 * (in(i) - in(i - 2)).
15 This filter cuts out 0 Hz and the Nyquist frequency.
18 classmethods::
20 method::ar, kr
22 argument::in
24 The input signal.
26 Examples::
28 code::
29 //Compare:
31 { WhiteNoise.ar(0.25) }.play;
33 { BPZ2.ar(WhiteNoise.ar(0.25)) }.play;