Can I play these on a CD player?

The tracks are simple MP3s files, not CD audio tracks so your player would have to be able to play MP3 files (many players do support that).

Since CDs are limited to 99 tracks and because we provide over 1100 recordings, it would take many, many CDs to include the entire collection.

Of course if you really wanted CD tracks you could always select the ones you wanted on an Audio CD and burn a disc.