Description

Generates is a controlled pseudo-random number series between min and max values.

Syntax

ares random kmin, kmax

ires random imin, imax

kres random kmin, kmax

Initialization

imin -- minimum range limit

imax -- maximum range limit

Performance

kmin -- minimum range limit

kmax -- maximum range limit

The random opcode is similar to linrand and trirand but sometimes I [Gabriel Maldonado] find it more convenient because allows the user to set arbitrary minimum and maximum values.

Examples

Here is an example of the random opcode. It uses the file random.csd.

<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 random.wav -W ;;; for file output any platform
</CsOptions>
<CsInstruments>

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

instr 1	;same values every time

krnd random 100, 1000
     printk .5, krnd			; look 
aout oscili 0.8, 440+krnd, 1		; & listen
     outs aout, aout

endin

instr 2	;different values every time

seed 0
krnd random 100, 1000			; seed from system clock
     printk .5, krnd			; look 
aout oscili 0.8, 440+krnd, 1		; & listen
     outs aout, aout

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

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

Its output should include lines like:

 i   1 time     0.00067:   894.58566
 i   1 time     0.50000:   748.44281
 i   1 time     1.00000:   328.29916

WARNING: Seeding from current time 1656666052

 i   2 time     2.00067:   690.71466
 i   2 time     2.50000:   459.42445
 i   2 time     3.00000:   100.85594
      

See Also

linrand, randomh, randomi, trirand

Credits

Author: Gabriel Maldonado