HelpSource/Classes/BPeakEQ.schelp

   1 class:: BPeakEQ
   2 summary:: Parametric equalizer
   3 categories:: UGens>Filters>BEQSuite
   4 related:: Classes/SOS, Classes/BLowPass, Classes/BLowPass4, Classes/BHiPass, Classes/BHiPass4, Classes/BPeakEQ, Classes/BLowShelf, Classes/BHiShelf, Classes/BBandPass, Classes/BBandStop, Classes/BAllPass
   5
   6 description::
   7 The B equalization suite is based on the Second Order Section (link::Classes/SOS::) biquad UGen.
   8
   9 note::
  10 Biquad coefficient calculations imply certain amount of CPU overhead. These plugin UGens contain optimizations such that the coefficients get updated only when there has been a change to one of the filter's parameters. This can cause spikes in CPU performance and should be considered when using several of these units.
  11 ::
  12
  13 classmethods::
  14
  15 method:: ar
  16 argument:: in
  17 input signal to be processed.
  18 argument:: freq
  19 center frequency.
  20 argument:: rq
  21 the reciprocal of Q. bandwidth / cutoffFreq.
  22 argument:: db
  23 boost/cut the center frequency (in dBs).
  24
  25 examples::
  26 code::
  27 s.boot;
  28 (
  29 z = { // toy with boost/cut
  30 BPeakEQ.ar(
  31         SoundIn.ar([0,1]),
  32         MouseX.kr(20, 20000, \exponential),
  33         0.8, // rq
  34         MouseY.kr(12.0, -12.0, \linear),
  35         0.5); // mul
  36 }.play)
  37 z.release;
  38
  39 (
  40 z = { // toy with rq
  41 BPeakEQ.ar(
  42         SoundIn.ar([0,1]),
  43         MouseX.kr(20, 20000, \exponential),
  44         MouseY.kr(10, 0.4, \linear), // rq
  45         6, // boost/cut - +6dB
  46         0.5); // mul
  47 }.play)
  48 z.release;
  49 ::