An audio reproduction apparatus randomizes or shuffles the playback order of tracks from a prerecorded media such as a compact disc within a multiple-disc changer. Shuffle sequences are generated using a linear congruential random number generator (LCRNG). The shuffle sequence does not have to be stored...http://www.google.de/patents/US6707768?utm_source=gb-gplus-sharePatent US6707768 - Randomized playback of tracks in a multimedia player
