 If a sequence is programmed while the MC-4 is set to the default TB it will never sync correctly to Din or MIDI clock.To sync correctly the MC-4 TB needs to be set as 48/12/6, this sets the MC-4 for Din sync and defaults the step time to 16ths (12 clocks) and the gate length to 32nds (6 clocks).In 2011, Defective Records Software released MC-4 Hack, a software application that enables programming of the MC-4's sequencer on computer.