exprandi — Exponential distribution random number generator with interpolation (positive values only).
Exponential distribution random number generator with controlled interpolation between values (positive values only). This is an x-class noise generator.
ares exprandi klambda, xamp, xcps
ires exprandi klambda, xamp, xcps
kres exprandi klambda, xamp, xcps
klambda -- lambda parameter for the exponential distribution.
The probablity density function of an exponential distribution is an exponential curve, whose mean is 0.69515/lambda. 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.
xamp -- range over which random numbers are distributed.
xcps -- the frequency which new random numbers are generated.
Here is an example of the exprandi opcode. Play exprandi.csd
Example 281. Example of the exprandi 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 realtime audio input is needed too ; For Non-realtime ouput leave only the line below: ; -o exprand.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 klambda exprandi 20, 1, 3 printk2 klambda ; look aout oscili 0.8, 440+klambda, 1 ; & listen outs aout, aout endin </CsInstruments> <CsScore> ; sine wave f 1 0 16384 10 1 i 1 0 4 e </CsScore> </CsoundSynthesizer>