the din sync standard is so named because it uses 5-pin din connectors, the same as used for midi. din sync itself is not a din standard. note that despite using the same connectors as midi, it uses different pins on these connectors (1, 2, and 3 rather than midi's 2, 4 and 5), so a cable made specifically for midi will not necessarily have the pins required for din sync physically connected via wires. in some applications the remaining pins (4 and 5) are used as "tap", "fill in" or "reset and start", but this differs from one device to another.