I don't have the manual in front of me, but it also says that while using the record function, the Registration Memory FREEZES, allowing you only to change the voice you are playing, but not the settings of the accompaniment at all. Whatever accompaniment you start recording with, you are stuck with throughout the entire song, unlike my 510 which allowed you to change all kinds of accompaniment settings using the Registration Memory WHILE RECORDING.

Again, I feel like I must be overlooking something, because I cannot for the life of me figure out why Yamaha would remove such necessary features from older models while making a new one.