On this site: http://www.yamahapkowner.com/dgx305_spec.php

and this site: http://music.yamaha.com/products/features.html?productId=44

it says that the DGX-305 has a Music Database feature, but I can't find instructions on how to use it in the manual. Can anyone confirm that this is actually a feature on the 305, and maybe tell me how I can use it?