trandom

Generates a controlled pseudo-random number series between min and max values at k-rate whenever the trigger parameter is different to 0.

Syntax

ModernClassic

kout = trandom(ktrig, kmin, kmax)

kout trandom ktrig, kmin, kmax

Performance

ktrig -- trigger opcode produces a new random number whenever this value is not 0.

kmin -- minimum range limit

kmax -- maximum range limit

trandom is almost identical to random opcode, except trandom updates its output with a new random value only when the ktrig argument is triggered (i.e. whenever it is not zero).

Examples

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

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

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

seed 0                          ; every run time different values       

instr 1 

kmin init 0                     ;random number between 0 and 220
kmax init 220
ktrig = p4
k1   trandom ktrig, kmin, kmax
     printk2 k1                 ;print when k1 changes
asig poscil .4, 220+k1, 1       ;if triggered, add random values to frequency
     outs asig, asig

endin
</CsInstruments>
<CsScore>
f1 0 4096 10 1

i 1 0 2 0       ;not triggered
i 1 + 2 1       ;triggered
e
</CsScore>
</CsoundSynthesizer>

See also

Random (Noise) Generators

Credits

Written by Gabriel Maldonado.

New in Csound 5.06