Importance

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Abstract

An apparatus and method of scheduling audio tracks on audio compact discs in a CD jukebox to be played at predetermined times is disclosed. The method includes storing, in a CD audio track index location on an audio CD, a value indicating that the audio CD is a sequence CD containing audio tracks that are to be played at predetermined times. The stored value also specifies a predetermined sequence, or schedule to use with the sequence CD. A controller computer, within the CD jukebox and external to the CD player, utilizes CD-DA commands to query the CD player for the CD audio track index on each audio CD. The responses are used to distinguish normal audio CDs from sequence CDs. A periodic interrupt invokes a sequence interrupt handler that determines whether any audio tracks on any sequence CDs are scheduled to be played. If one or more audio tracks are scheduled to be played, the CD slot number and audio track number are inserted at the front of a queue of selections to be played, causing the newly-entered selections to be played after a presently-playing audio track completes.

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First Claim