85 lines
1 KiB
Racket
85 lines
1 KiB
Racket
#lang scribble/manual
|
|
@(require (for-label racket))
|
|
|
|
@title{Schmidt}
|
|
Schmidt trigger.@section{related}
|
|
Classes/InRange, Classes/InRect
|
|
@section{categories}
|
|
UGens>Maths
|
|
|
|
|
|
@section{description}
|
|
|
|
|
|
If
|
|
@racketblock[in > hi::, output 1. If ]
|
|
|
|
@racketblock[in < lo::, output 0. Otherwise, repeat the
|
|
last sample of output, assumed to be 0 at initialization. In sclang-flavored
|
|
pseudocode:
|
|
|
|
]
|
|
|
|
@racketblock[
|
|
out[i] = if(in[i] < lo[i]) {
|
|
0
|
|
} {
|
|
if(in[i] > hi[i]) {
|
|
1
|
|
} {
|
|
out[i-1]
|
|
}
|
|
};
|
|
::
|
|
|
|
]
|
|
@section{classmethods}
|
|
|
|
|
|
@section{method}
|
|
ar, kr
|
|
|
|
@section{argument}
|
|
in
|
|
|
|
Signal to be tested.
|
|
|
|
|
|
@section{argument}
|
|
lo
|
|
|
|
Low threshold.
|
|
|
|
|
|
@section{argument}
|
|
hi
|
|
|
|
High threshold.
|
|
|
|
|
|
@section{Examples}
|
|
|
|
|
|
|
|
@racketblock[
|
|
|
|
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;
|
|
)
|
|
|
|
::
|
|
|
|
]
|
|
|
|
|