Poisson distribution random number generator (positive values only). This is an x-class noise generator.
klambda -- the mean of the distribution. Outputs only positive numbers.
For more detailed explanation of these distributions, see:
C. Dodge - T.A. Jerse 1985. Computer music. Schirmer books. pp.265 - 286
D. Lorrain. A panoply of stochastic cannons. In C. Roads, ed. 1989. Music machine . Cambridge, Massachusetts: MIT press, pp. 351 - 379.
Here is an example of the poisson opcode. It uses the files poisson.orc and poisson.sco.
Example 15-1. Example of the poisson opcode.
/* poisson.orc */
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1
; Instrument #1.
instr 1
; Generates a random number in a poisson distribution.
; klambda = 1
i1 poisson 1
print i1
endin
/* poisson.orc */
/* poisson.sco */
; Play Instrument #1 for one second.
i 1 0 1
e
/* poisson.sco */
instr 1: i1 = 1.000