55 lines
1.1 KiB
Text
55 lines
1.1 KiB
Text
|
#lang scribble/manual
|
||
|
|
@(require (for-label racket))
|
||
|
|
|
||
|
|
@title{(lin-cong-c rate freq a c m xi)}
|
||
|
|
|
||
|
|
(lin-cong-l rate freq a c m xi)
|
||
|
|
(lin-cong-n rate freq a c m xi)
|
||
|
|
|
||
|
|
linear congruential chaotic generator.
|
||
|
|
|
||
|
|
freq - iteration frequency in Hertz
|
||
|
|
a - multiplier amount
|
||
|
|
c - increment amount
|
||
|
|
m - modulus amount
|
||
|
|
xi - initial value of x
|
||
|
|
|
||
|
|
A cubic-interpolating sound generator based on the difference
|
||
|
|
equation:
|
||
|
|
|
||
|
|
xn+1 = (axn + c) % m
|
||
|
|
|
||
|
|
The output signal is automatically scaled to a range of [-1, 1].
|
||
|
|
|
||
|
|
|
||
|
|
Default initial parameters.
|
||
|
|
|
||
|
|
(audition
|
||
|
|
(out 0 (let ((x (mouse-x kr 20 sample-rate 0 0.1)))
|
||
|
|
(mul (lin-cong-c ar x 1.1 0.13 1 0) 0.2))))
|
||
|
|
|
||
|
|
|
||
|
|
randomly modulate parameters.
|
||
|
|
|
||
|
|
(audition
|
||
|
|
(out 0 (mul (lin-cong-c ar
|
||
|
|
(mul-add (lf-noise2 kr 1.0) 1e4 1e4)
|
||
|
|
(mul-add (lf-noise2 kr 0.1) 0.5 1.4)
|
||
|
|
(mul-add (lf-noise2 kr 0.1) 0.1 0.1)
|
||
|
|
(lf-noise2 kr 0.1)
|
||
|
|
0)
|
||
|
|
0.2)))
|
||
|
|
|
||
|
|
As frequency control...
|
||
|
|
|
||
|
|
(audition
|
||
|
|
(out 0 (mul (sin-osc ar (mul-add (lin-cong-c ar
|
||
|
|
40
|
||
|
|
(mul-add (lf-noise2 kr 0.1) 0.1 1.0)
|
||
|
|
(mul-add (lf-noise2 kr 0.1) 0.1 0.1)
|
||
|
|
(lf-noise2 kr 0.1)
|
||
|
|
0)
|
||
|
|
500 600) 0)
|
||
|
|
0.4)))
|
||
|
|
|