fractalnoise — A fractal noise generator.
A fractal noise generator implemented as a white noise filtered by a cascade of 15 first-order filters.
kamp -- amplitude.
kbeta -- spectral parameter related to the fractal dimension
0 - white
1 - pink
2 - brown
Here is an example of the fractalnoise opcode. It uses the file fractalnoise.csd.
Example 325. Example of the fractalnoise 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 oscil.wav -W ;;; for file output any platform </CsOptions> <CsInstruments> sr = 44100 ksmps = 32 nchnls = 2 0dbfs = 1 instr 1 kbeta linseg 0, p3/4, 2, p3/4, 0, p3*0.1, 2, p3*0.15, 0 seed 20120124 aout fractalnoise 0.05, kbeta outs aout, aout endin </CsInstruments> <CsScore> i1 0 10 e </CsScore> </CsoundSynthesizer>
R. Saletti. A comparison between two methods to generate 1/(f^gamma) noise. In Proc. IEEE, volume 74, pp. 1595-1596, November 1986.
G. Corsini and R. Saletti. A 1/(f^gamma) power spectrum noise sequence generator. IEEE Trans. on Instrumentation and Measurement, 37(4):615-619, December 1988.
The Sounding Object, edited by Davide Rocchesso and Federico Fontana, Edizioni di Mondo Estremo. Chapter 8 by Federico Avanzini, pp. 154-157.