eight samplers, corresponding to columns of the grid.
record by holding second-from-bottom key.
focus arc to column by pushing bottom key.
left knob is loop selection. turn to move selection, push-turn to resize selection.
right knob is volume. turning changes velocity, not position, so a tremelo effect is easily achieved. pushing down stops the spin, like a turntable.
third key up is mute/unmute. top rows transpose up/down by octaves. top rows meter sound levels.