weibull — Weibull distribution random number generator (positive values only).
Weibull distribution random number generator (positive values only). This is an x-class noise generator
ksigma -- scales the spread of the distribution.
ktau -- if greater than one, numbers near ksigma are favored. If smaller than one, small values are favored. If t equals 1, the distribution is exponential. Outputs only positive numbers.
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 weibull opcode. It uses the file weibull.csd.
Example 1041. Example of the weibull 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 weibull.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 weibull 100, 1 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 weibull 100, 1 printk .2, ktri ; look aout oscili 0.8, 440+ktri, 1 ; & listen outs aout, aout endin instr 3 ; every run time different values seed 0 ktri weibull 100, 10 ; closer to ksigma.. 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 i 3 6 2 e </CsScore> </CsoundSynthesizer>
Its output should include a line like these:
i 1 time 0.00073: 168.59070
i 1 time 0.20027: 98.72078
i 1 time 0.40054: 48.57351
i 1 time 0.60009: 171.46941
i 1 time 0.80036: 50.20434
i 1 time 1.00063: 50.84775
i 1 time 1.20018: 18.16301
i 1 time 1.40045: 44.41001
i 1 time 1.60000: 0.98506
i 1 time 1.80027: 36.19192
WARNING: Seeding from current time 2444541554
i 2 time 3.00045: 20.81653
i 2 time 3.20000: 116.17060
i 2 time 3.40027: 9.23891
i 2 time 3.59982: 95.67111
i 2 time 3.80009: 296.52851
i 2 time 4.00036: 39.28636
i 2 time 4.19991: 13.54326
i 2 time 4.40018: 54.92388
i 2 time 4.59973: 268.05584
i 2 time 4.80000: 95.27069
i 2 time 5.00027: 91.62076
WARNING: Seeding from current time 2447542341
i 3 time 6.00091: 94.40902
i 3 time 6.20045: 111.10193
i 3 time 6.40073: 99.38797
i 3 time 6.60027: 98.54267
i 3 time 6.80054: 106.53899
i 3 time 7.00082: 106.30752
i 3 time 7.20036: 88.75486
i 3 time 7.40063: 106.45703
i 3 time 7.60091: 84.59854
i 3 time 7.80045: 106.76515