48 lines
1.1 KiB
Text
48 lines
1.1 KiB
Text
|
#lang scribble/manual
|
||
|
|
@(require (for-label racket))
|
||
|
|
|
||
|
|
@title{(gbman-c rate freq xi yi)}
|
||
|
|
|
||
|
|
(gbman-l rate freq xi yi)
|
||
|
|
(gbman-n rate freq xi yi)
|
||
|
|
|
||
|
|
Gingerbreadman map chaotic generator. Cubic, linear and
|
||
|
|
non-interpolating variants.
|
||
|
|
|
||
|
|
freq - iteration frequency in Hertz
|
||
|
|
xi - initial value of x
|
||
|
|
yi - initial value of y
|
||
|
|
|
||
|
|
A linear-interpolating sound generator based on the difference
|
||
|
|
equations:
|
||
|
|
|
||
|
|
xn+1 = 1 - yn + |xn|
|
||
|
|
yn+1 = xn
|
||
|
|
|
||
|
|
The behavior of the system is dependent only on its initial conditions
|
||
|
|
qand cannot be changed once it's started.
|
||
|
|
|
||
|
|
Reference: Devaney, R. L. "The Gingerbreadman." Algorithm 3, 15-16,
|
||
|
|
Jan. 1992.
|
||
|
|
|
||
|
|
sclang default initial parameters.
|
||
|
|
|
||
|
|
(audition
|
||
|
|
(out 0 (mul (gbman-l ar (mouse-x kr 20 sample-rate 0 0.1) 1.2 2.1) 0.1)))
|
||
|
|
|
||
|
|
Different initial parameters.
|
||
|
|
|
||
|
|
(audition
|
||
|
|
(out 0 (mul (gbman-l ar (mouse-x kr 20 sample-rate 0 0.1) -0.7 -2.7) 0.1)))
|
||
|
|
|
||
|
|
Wait for it...
|
||
|
|
|
||
|
|
(audition
|
||
|
|
(out 0 (mul (gbman-l ar (mouse-x kr 20 sample-rate 0 0.1) 1.2 2.0002) 0.1)))
|
||
|
|
|
||
|
|
As a frequency control
|
||
|
|
|
||
|
|
(audition
|
||
|
|
(out 0 (mul (sin-osc ar (mul-add (gbman-l ar 40 1.2 2.1) 400 500) 0) 0.4)))
|
||
|
|
|