Rikki,

Actually the PSR-E403 and the YPT-400 are identical keyboards with identical features. The manual for my PSR-E403 is also the manual for the YPT-400. Both models #'s are on the cover and the manual refers to both of them all the way through, including the spec list in the back. It is confusing why the same keyboard is given 2 different no's. I'm sure Yamaha has a good reason. (They're just not telling us!)

Tim

[This message has been edited by CoasterTim (edited 08-17-2006).]