HelpSource/Classes/Schmidt.schelp

   1 class:: Schmidt
   2 summary:: Schmidt trigger.
   3 related:: Classes/InRange, Classes/InRect
   4 categories::  UGens>Maths
   5
   6
   7 Description::
   8
   9 When  code::in::  crosses to greater than
  10 code::hi:: , output 1, then when signal crosses lower
  11 than  code::lo::  output 0. Uses the formula:
  12
  13 code::
  14
  15 if (out == 1, { if (in < lo, { out = 0.0 }) }, { if (in > hi, { out = 1.0 }) }).
  16
  17 ::
  18
  19 Output is initially zero.
  20
  21
  22 classmethods::
  23
  24 method::ar, kr
  25
  26 argument::in
  27
  28 Signal to be tested.
  29
  30
  31 argument::lo
  32
  33 Low threshold.
  34
  35
  36 argument::hi
  37
  38 High threshold.
  39
  40
  41 Examples::
  42
  43 code::
  44
  45 Server.internal.boot;
  46
  47 { Schmidt.kr(SinOsc.kr(1, 0, 0.2), -0.15, 0.15)}.scope; // see the trigger
  48
  49 { Schmidt.kr(MouseX.kr(0, 1), 0.2, 0.8)}.scope; // try it with the cursor
  50
  51 // threshold octave jumps
  52 (
  53 {
  54         var in = LFNoise1.kr(3);
  55         var octave = Schmidt.kr(in, -0.15, 0.15) + 1;
  56         SinOsc.ar(in * 200 + 500 * octave, 0, 0.1)
  57 }.scope;
  58 )
  59
  60 ::
  61