Official comment
The HOT CUE functions as expected, ROLL will perform 1/4, 1/2, 1, 2, 4, 8, 16, 32 beat rolls, SLICER performs a beat jump function of 1, 2, 4, 8 or 16 (with shift) beats in < or > direction.
The AUTO LOOP button will always make a 4 beat loop when pressed, but then you can turn the knob to go from 1/128 to 512 beats.
The SLIP and CENSOR buttons do as they're labelled, SHIFT+SLIP toggles the QUANTIZE function of the player.
SYNC works as well.