fractalnoise
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## fractalnoise

fractalnoise — A fractal noise generator.

## Description

A fractal noise generator implemented as a white noise filtered by a cascade of 15 first-order filters.

## Syntax

    ares fractalnoise kamp, kbeta

## Performance

kamp -- amplitude.

kbeta -- spectral parameter related to the fractal dimension

- 0 - white

- 1 - pink

- 2 - brown

## Examples

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

Example 351. 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>

## References

1. R. Saletti. A comparison between two methods to generate 1/(f^gamma) noise. In Proc. IEEE, volume 74, pp. 1595-1596, November 1986.

2. 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.

3. The Sounding Object, edited by Davide Rocchesso and Federico Fontana, Edizioni di Mondo Estremo. Chapter 8 by Federico Avanzini, pp. 154-157.

## Credits

Author: Tito Latini
January 2012

New in Csound version 5.16

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