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

Improved Euler 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)

y = Dx

All inputs can have .kr rate UGens plugged in.

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

//Can be very noisy, high pitched and aliases badly- ie 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(DoubleWell2.ar(Impulse.kr(2),MouseX.kr(0.01,0.1,'exponential'),MouseY.kr(0.01,0.1,'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)),1000,0.1), 0.05,0.05,2 ) ,0.0))}.play ) //plotting check of first samples {DoubleWell2.ar(0,0.1,0.1,0.4,1,0.25,0,0.0)}.plot(0.05, minval:-1, maxval:1) //gradually changing force {DoubleWell2.ar(0,0.1,0.1,Line.kr(0.01,0.8,10),1,0.25,0,0.0)}.play //controlling force- guitar feedback! {DoubleWell2.ar(0,0.1,0.1,MouseX.kr(0.0,10.0),1,MouseY.kr(0.0,1.0),0,0.0)}.play //triggering {DoubleWell2.ar(Impulse.kr(MouseY.kr(1,10, 'exponential')),0.1,0.1,MouseX.kr(0.0,10.0),1,MouseY.kr(0.0,1.0),LFNoise0.kr(2.3,0.2,0.8),LFNoise1.kr(2.37,0.2,0.8))}.play //overload patch {DoubleWell2.ar(Dust.kr(LFNoise0.kr(0.5,0.2,0.4)),0.1,0.1,MouseX.kr(0.0,50.0),MouseY.kr(0.0,1.0),0.25, LFNoise0.kr(2.3,0.4,0.5),LFNoise1.kr(2.37,0.4,0.2))}.play

helpfile source: /usr/local/share/SuperCollider/Extensions/SC3plugins/SLUGens/HelpSource/Classes/DoubleWell2.schelp

link::Classes/DoubleWell2::

link::Classes/DoubleWell2::