36 lines
708 B
Racket
36 lines
708 B
Racket
#lang scribble/manual
|
|
@(require (for-label racket))
|
|
|
|
@title{ZeroCrossing}
|
|
Zero crossing frequency follower@section{categories}
|
|
UGens>Analysis>Pitch
|
|
|
|
@section{description}
|
|
|
|
Outputs a frequency based upon the distance between interceptions of the X axis. The X intercepts are determined via linear interpolation so this gives better than just integer wavelength resolution. This is a very crude pitch follower, but can be useful in some situations.
|
|
|
|
@section{classmethods}
|
|
|
|
@section{method}
|
|
ar, kr
|
|
@section{argument}
|
|
in
|
|
Input signal.
|
|
|
|
@section{examples}
|
|
|
|
|
|
|
|
@racketblock[
|
|
s.boot;
|
|
(
|
|
{
|
|
var a;
|
|
a = SinOsc.ar(SinOsc.kr(1, 0, 600,700), 0, 0.1);
|
|
[a, ZeroCrossing.ar(a) * 0.0005]
|
|
}.scope;
|
|
)
|
|
::
|
|
]
|
|
|
|
|