Cauchy distribution random number generator (positive values only). This is an x-class noise generator.
pcauchy kalpha -- controls the spread from zero (big kalpha = big spread). Outputs positive numbers only.
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 pcauchy opcode. It uses the files pcauchy.orc and pcauchy.sco.
Example 1. Example of the pcauchy opcode.
/* pcauchy.orc */
; Initialize the global variables.
sr = 44100
kr = 4410
ksmps = 10
nchnls = 1
; Instrument #1.
instr 1
; Generate a random number between 0 and 1.
; kalpha = 1
i1 pcauchy 1
print i1
endin
/* pcauchy.orc */
/* pcauchy.sco */
; Play Instrument #1 for one second.
i 1 0 1
e
/* pcauchy.sco */
instr 1: i1 = 0.012