standardchaos

Abstract

Standard map chaotic generator

Description

standardchaos is a chaotic generator, the sound is generated with the following difference equations;

y[n] = (y[n-1] + k * sin(x[n-1])) % 2pi;
x[n] = (x[n-1] + y[n]) % 2pi;
out = (x[n] - pi) / pi

Syntax

    aout standardchaos krate, kk=1, ix=0.5, iy=0

Arguments

• krate: from 0 to nyquist
• kk: a value for k in the above equation
• ix: initial value for x
• iy: initial value for y

Output

• aout: audio output of the chaotic generator

Execution Time

• Performance (audio)

Examples

<CsoundSynthesizer>
<CsOptions>
-odac           
</CsOptions>

<CsInstruments>
sr     = 44100
ksmps  = 64
nchnls = 2
0dbfs  = 1

/* Example file for standardchaos opcode

    aout standardchaos krate, kk, ix=0.5, iy=0

    Standard map chaotic generator, the sound is generated with the difference equations;
    y[n] = (y[n-1] + k * sin(x[n-1])) % 2pi;
    x[n] = (x[n-1] + y[n]) % 2pi;
    out = (x[n] - pi) / pi;

*/

chn_k "rate", "r"
chn_k "kval", "r"

instr 1
    ix = 0.1
    iy = 0.0
    igain = 0.3
    krate chnget "rate"
    kk chnget "kval"

    aout standardchaos krate, kk, ix, iy
    aout *= igain
    outs aout, aout 
endin

</CsInstruments>

<CsScore>
i1 0 100

</CsScore>
</CsoundSynthesizer>


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  <objectName>rate</objectName>
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  <borderColor>#1b1b1b</borderColor>
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  <borderwidth>0</borderwidth>
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<bsbPresets>
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See also

• crackle
• chuap
• dust2

Credits

Eduardo Moguillansky, 2019 (based on pd/else's standard~ - https://github.com/porres/pd-else)