Try going to Menu,
Then on menu 2 open "Transpose" and make sure that Master, Keyboard and Song are all set
to 0.
This happens when we sometimes try a song or registration in another key, and then save
our settings without restoring the transposition back to Zero.
I hope this helps.
Best Regards,
Abby.
PS: Funny thing though, this never happened in the 9 years that I had my Tyros3.