A method for playing tunes from a plurality of disks stored in a magazine in random order and without repeating any one tune. Three memories are provided. In the first there are recorded the identities of disks which have already been played, in the second, the identities of already-played tune S on...http://www.google.ca/patents/US4792934?utm_source=gb-gplus-sharePatent US4792934 - Disk playing method for multi-disk player
