The sync-type data type

The sync-type type specifies the style that a score following application should use to synchronize an accompaniment with a performer. The none type indicates no synchronization to the performer. The tempo type indicates synchronization based on the performer tempo rather than individual events in the score. The event type indicates synchronization by following the performance of individual events in the score rather than the performer tempo. The mostly-tempo and mostly-event types combine these two approaches, with mostly-tempo giving more weight to tempo and mostly-event giving more weight to performed events. The always-event type provides the strictest synchronization by not being forgiving of missing performed events.