Math
Square root. It creates a gentle curve and is useful for scaling modulation or converting power-like values back toward amplitude-like values.
Input should stay positive for predictable results.
sqrt(0.25+0.75*param(2))
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.