QuadN

A non-interpolating sound generator based on the difference equation:

x[n+1] = a * pow(x[n], 2) + b * x[n] + c

===Examples===

// default parameters
play { QuadN.ar(SampleRate.ir/4) * 0.2 }

// logistic map
play {
 // equation: x1 = -r*x0^2 + r*x0
 val r = MouseX.kr(3.5441, 4)    // stable range
 QuadN.ar(SampleRate.ir/4, -r, r, 0, 0.1) * 0.4
}

// logistic map as frequency control
play {
 val r = MouseX.kr(3.5441, 4)    // stable range
 SinOsc.ar(QuadN.ar(40, -r, r, 0, 0.1).mulAdd(800, 900)) * 0.4
}