Oscillator / Waveshaper
Two saw oscillators mixed together with a small detune amount. Typical detune values are around 0.02 to 0.35 for chorus-like width.
Detune/spread is usually small: 0.01 to 0.35. Larger values sound wider but less tuned.
dualsaw(X, 0.08+0.25*param(3))
For pitched oscillator functions, X already contains the current MIDI note pitch and transpose information. Prefer saw(X), sin(X), or pwm(X, 0.4) unless you intentionally want an octave or ratio shift such as 0.5*X or 2*X.