A trade name of the Ampex Corporation used to describe the adding of live sound to a spare track to synchronize with recordings on a multitrack tape or film by the temporary use of other tracks of the record head for replay. Sel-Sync is an abbreviation of selective synchronization.
"The job you guys did on Manhattan Wildlife Refuge and Tiger of San Pedro by Bill Watrous exceeded my expectations. The sonic quality and texture was really as good as the day the vinyl was brand new. Having these in a form which will last for a very long time without deterioration is quiet a joy to me. You will certainly get additional business ..."