unirand — Uniform distribution random number generator (positive values only).
Uniform distribution random number generator (positive values only). This is an x-class noise generator.
krange -- the range of the random numbers (0 - krange).
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 unirand opcode. It uses the file unirand.csd.
Example 958. 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().