How a param's value maps to/from its 0..1 position:
linear
v = min + p·(max−min)
log
min > 0 && max > 0
piecewise
How a param's value maps to/from its 0..1 position:
linear— value is linear in position (v = min + p·(max−min)).log— value is geometric in position (constant ratio per unit throw); requiresmin > 0 && max > 0(a frequency sweep, e.g. 20 Hz…20 kHz).piecewise— an arbitrary monotonic curve given as breakpoints, linearly interpolated between them (captured / calibrated console tapers).