This option allows you to synch the DSS up to other electronic devices. The triggering is performed through the APPLE Game I/O Port. Pin 2 carries the Trigger Input and pin 15 carries the Trigger Output with pin 8 being the common ground. All trigger levels are TTL compatible. Basically a trigger pulse is sent or received every time a sample is played. Enabling with a high or a low pulse is selectable from the menu,