Math
Inverse sine. It returns the angle whose sine is the input value. It is mainly useful for special waveshaping and should normally receive values from -1.0 to 1.0.
Input should normally be between -1.0 and 1.0.
asin(0.25)
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.