51 lines
684 B
Racket
51 lines
684 B
Racket
#lang scribble/manual
|
|
@(require (for-label racket))
|
|
|
|
@title{Changed}
|
|
@section{categories}
|
|
UGens>Triggers, UGens>Filters>Linear
|
|
Triggers when a value changes
|
|
@section{description}
|
|
|
|
Triggers when a value changes.
|
|
|
|
@section{classmethods}
|
|
|
|
@section{method}
|
|
ar, kr
|
|
A special case fixed filter.
|
|
|
|
@section{argument}
|
|
input
|
|
signal input
|
|
@section{argument}
|
|
threshold
|
|
threshold
|
|
|
|
@section{discussion}
|
|
|
|
Implements the formula:
|
|
|
|
@racketblock[
|
|
out(i) = abs(in(i) - in(i-1)) > thresh
|
|
::
|
|
|
|
]
|
|
@section{examples}
|
|
|
|
|
|
detect changes in a signal:
|
|
|
|
@racketblock[
|
|
(
|
|
{
|
|
var changingSignal = LFNoise0.ar(1000);
|
|
var changed = Changed.ar(changingSignal);
|
|
[changingSignal, changed]
|
|
}.plot2
|
|
);
|
|
::
|
|
|
|
]
|
|
|
|
|