Classes (extension)
| UGens > Generators > Chaotic

Extension

Forced DoubleWell Oscillator

Source: SLUGens.sc

//SLUGens released under the GNU GPL as extensions for SuperCollider 3, by Nick Collins, http://composerprogrammer.com/index.html

Runge-Kutta ODE solver implementation of the chaotic Forced Double Well Oscillator (see Strogatz, Steven H. (1994) Nonlinear Dynamics and Chaos. Addison-Wesley, Reading, MA. pp441-7).

D2x +delta*Dx-x+x^3 = F*cos(w*t)

All inputs can have .kr rate UGens plugged in.

note for me: add a t rate control? or arbitary oscillator input rather than Fcos(wt)

reset |
restart with new initial conditions sampled from initx, inity |

ratex |
update rate for x |

ratey |
update rate for y |

f |
equation constant |

w |
equation constant |

delta |
equation constant |

initx |
reset value for x |

inity |
reset value for y |

//Can be very noisy, high pitched and aliases badly: e.g., great fun, but watch out for your ears, filter, try out odd param settings. I've turned all the amplitudes down in the following //defaults, high pitched! WARNING {Out.ar(0,Pan2.ar(0.1*DoubleWell.ar(Impulse.kr(0),MouseX.kr(0.01,1,'exponential'),MouseY.kr(0.01,1,'exponential'),0.9,0.0001,0.25,LFNoise0.kr(1,0.4,0.5),LFNoise0.kr(1,0.4,0.5)),0.0))}.play //2 per second ( {Out.ar(0,Pan2.ar( CombN.ar( Resonz.ar(DoubleWell.ar(Impulse.kr(2),MouseX.kr(0.01,1,'exponential'),MouseY.kr(0.01,1,'exponential'),3.9,MouseX.kr(0.0001,0.01,'exponential'),0.25,LFNoise0.kr(1,0.4,0.5),LFNoise0.kr(1,10.4,10.5)),500,0.1), 0.05,0.05,2 ) ,0.0))}.play ) //plotting check of first samples {DoubleWell.ar(1,0.025,0.025,0.4,1,0.25,-0.5,-0.2)}.plot(0.01, minval:-1, maxval:1)

helpfile source: /usr/local/share/SuperCollider/Extensions/SC3plugins/SLUGens/HelpSource/Classes/DoubleWell.schelp

link::Classes/DoubleWell::

link::Classes/DoubleWell::