/usr/share/SuperCollider/HelpSource/Classes/Schmidt.schelp is in supercollider-common 1:3.8.0~repack-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | class:: Schmidt
summary:: Schmidt trigger.
related:: Classes/InRange, Classes/InRect
categories:: UGens>Maths
Description::
When code::in:: crosses to greater than
code::hi:: , output 1, then when signal crosses lower
than code::lo:: output 0. Uses the formula:
code::
if (out == 1, { if (in < lo, { out = 0.0 }) }, { if (in > hi, { out = 1.0 }) }).
::
Output is initially zero.
classmethods::
method::ar, kr
argument::in
Signal to be tested.
argument::lo
Low threshold.
argument::hi
High threshold.
Examples::
code::
s.boot;
{ Schmidt.kr(SinOsc.kr(1, 0, 0.2), -0.15, 0.15)}.scope; // see the trigger
{ Schmidt.kr(MouseX.kr(0, 1), 0.2, 0.8)}.scope; // try it with the cursor
// threshold octave jumps
(
{
var in = LFNoise1.kr(3);
var octave = Schmidt.kr(in, -0.15, 0.15) + 1;
SinOsc.ar(in * 200 + 500 * octave, 0, 0.1)
}.scope;
)
::
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