unirand
Prev | Orchestra Opcodes and Operators | Next

## unirand

unirand — Uniform distribution random number generator (positive values only).

## Description

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

## Syntax

    ares unirand krange

    ires unirand krange

    kres unirand krange

## Performance

krange -- the range of the random numbers (0 - krange).

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 unirand opcode. It uses the file unirand.csd.

Example 1056. Example of the unirand opcode.

See the sections Real-time Audio and Command Line Flags for more information on using command line flags.

    <CsoundSynthesizer>
    <CsOptions>
    ; Select audio/midi flags here according to platform
    -odac     ;;;realtime audio out
    ;-iadc    ;;;uncomment -iadc if RT audio input is needed too
    ; For Non-realtime ouput leave only the line below:
    ; -o unirand.wav -W ;;; for file output any platform
    </CsOptions>
    <CsInstruments>

    sr = 44100
    ksmps = 32
    nchnls = 2
    0dbfs  = 1

    instr 1  	; every run time same values

    ktri	unirand 100
    	printk .2, ktri			; look
    aout	oscili 0.8, 440+ktri, 1		; & listen
    	outs	aout, aout
    endin

    instr 2		; every run time different values

    	seed 0
    ktri	unirand 100
    	printk .2, ktri			; look
    aout	oscili 0.8, 440+ktri, 1		; & listen
    	outs	aout, aout
    endin

    </CsInstruments>
    <CsScore>
    ; sine wave
    f 1 0 16384 10 1

    i 1 0 2
    i 2 3 2
    e
    </CsScore>
    </CsoundSynthesizer>

Its output should include lines like these:

     i   1 time     0.00067:    81.47237
     i   1 time     0.20067:    41.72671
     i   1 time     0.40067:     5.96189
     i   1 time     0.60067:    91.59912
     i   1 time     0.80067:    85.07127
     i   1 time     1.00000:    92.50948
     i   1 time     1.20067:    98.79347
     i   1 time     1.40067:    98.91449
     i   1 time     1.60067:    50.37808
     i   1 time     1.80000:    72.02497
     i   1 time     2.00000:    52.94362

    WARNING: Seeding from current time 4007444022

     i   2 time     3.00067:    91.86294
     i   2 time     3.20067:    94.68759
     i   2 time     3.40067:     1.05825
     i   2 time     3.60000:    78.57628
     i   2 time     3.80067:    27.67408
     i   2 time     4.00000:    76.46347
     i   2 time     4.20000:    77.10071
     i   2 time     4.40067:    34.28921
     i   2 time     4.60067:    37.72286
     i   2 time     4.80067:    54.96646
     i   2 time     5.00000:    11.67566
    B  3.000 ..  5.000 T  5.000 TT  5.000 M:  0.80000  0.80000
    Score finished in csoundPerform().

## See Also

seed, betarand, bexprnd, cauchy, exprand, gauss, linrand, pcauchy, poisson, trirand, weibull

## Credits

Author: Paris Smaragdis
MIT, Cambridge
1995

Prev | Up | Next
tvconv | Home | until