[Lonman]

100K songs, no clue. Figure the same 500 songs are going to be done within a years time. A successful show could be run on no more than 1000 tracks IMO - provided you knew exactly which ones to list. There is a show in New Orleans that has a 500 song menu only - they only use upbeat songs & change throughtout the year to reflect what is being requested & currently on the radio. They actually state on the menu, if we don't have a song you want, it probably sucks!
SC don't even have more than 12K individual tracks in their own library from everything they've done both discontinued & active, at least of 5 years ago. CB have approx the same amount actively.