563 4-Track/8-Step Trigger Sequencer An EIGHT STEP/FOUR ROW TRIGGER SEQUENCER with built-in clock-oscillator. The 32 switches (with associated LEDs) have three positions each: gate-on, gate-off and reset. Switch-on time (adjustable width of the gate pulse) is independently variable for each of the four busses. Two buttons to shift and reset the trigger position manually (all [...]