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 argument:: mul
  25 argument:: add
  26
  27 examples::
  28 code::
  29 s.boot;
  30 (
  31 z = { // toy with boost/cut
  32 BPeakEQ.ar(
  33         SoundIn.ar([0,1]),
  34         MouseX.kr(20, 20000, \exponential),
  35         0.8, // rq
  36         MouseY.kr(12.0, -12.0, \linear),
  37         0.5); // mul
  38 }.play)
  39 z.release;
  40
  41 (
  42 z = { // toy with rq
  43 BPeakEQ.ar(
  44         SoundIn.ar([0,1]),
  45         MouseX.kr(20, 20000, \exponential),
  46         MouseY.kr(10, 0.4, \linear), // rq
  47         6, // boost/cut - +6dB
  48         0.5); // mul
  49 }.play)
  50 z.release;
  51 ::