How many bytes does it take to store a disc title? I don't have a jukebox, so I'll just snag a example from my TV listings. "Great Performances" is 18 bytes, and occupies the whole of the screen. log2(400) = 8.6439 bits. So, that's another 2 bytes. 20 bytes*400= 8K. Of curse, that's assuming that the jukebox doesn't support track titles. It may. 99 tracks of 18 bytes each plus an index would balloon each record to 20 bytes+ 99*(18+1)= 1901 bytes*400 =743 K. Hmm. Not much room for 14 days (672 half hours) of 500 channels.