SYNC

The SYNC standard, repeatedly called DIN sync, defines an interface for electronic music instrument. It was introduced in the 1980s by Roland firm for synchronization of music sequencers, drum machines, arpeggiators and similar devices. The SYNC standard uses the signal device and start/stop. This means the low position is 0 V, the high position is about +5 V. The clock signal defines the speed of the progression or drum pattern.
The start/stop signal defines if the sequence is successively ie;start/stop = 0 V -> stop, start/stop = +5 V -> running.The SYNC standard uses 5 pin DIN connectors, the same as used for MIDI, but uses a special pin-out. The term DIN sync does not mean that it is a DIN normal, only that it uses DIN connectors. In some applications the outstanding pins (4 and 5) are even used as tap, fill in or reset and start. But this differs from machine to device.To connect two SYNC devices a cable with a 3 or 5 pin plug up on each side has to be used. A standard MIDI cable is not fitting as here the pins 1 and 3 may be unconnected.