Quote the Radio 9 Handbook Page 17:
The CD drive can play audio CDs and CDs ith MP3 or WMA files.
blah blah blah...
*Only MP3/WMA files (titles) that were burned on a CD using ISO9660/Joliet file system can be played by the system.
*Recording media you have burned may cause read errors in rare cases, even where the medium is recognized correctly in the normal way.
*The maximum number of filders per CD is 256. The maximum total number of folders and titles is 512.
More technically stuff in the manual. Cant be bothered to type it. But that should cover any user error there is...
