pcauchy

pcauchy --  Cauchy distribution random number generator (positive values only).

Description

Cauchy distribution random number generator (positive values only). This is an x-class noise generator.

Syntax

ar pcauchy kalpha

ir pcauchy kalpha

kr pcauchy kalpha

Performance

pcauchy kalpha -- controls the spread from zero (big kalpha = big spread). Outputs positive numbers only.

For more detailed explanation of these distributions, see:

  1. C. Dodge - T.A. Jerse 1985. Computer music. Schirmer books. pp.265 - 286

  2. D. Lorrain. A panoply of stochastic cannons. In C. Roads, ed. 1989. Music machine . Cambridge, Massachusetts: MIT press, pp. 351 - 379.

Examples

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 */
/* Written by Kevin Conder */
; 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 */
/* Written by Kevin Conder */
; Play Instrument #1 for one second.
i 1 0 1
e
/* pcauchy.sco */
        
Its output should include a line like this:
instr 1:  i1 = 0.012
      

See Also

betarand, bexprnd, cauchy, exprand, gauss, linrand, poisson, trirand, unirand, weibull

Credits

Author: Paris Smaragdis

MIT, Cambridge

1995