Honestly I am grateful for the suggestion and participation in posting, more for this and other reasons, the CASIO WK-7600 needs an upgrade the operating system.Note: In split mode enabled for real-time controls the tone for the right hand and improve the method for how to recall the registration.I take this opportunity to wish merry christmasKelsen L PereiraCasio - WK-7600 ; Privia PX-5sRoland - VR-09 ; XV-3080 ; Sonic CellYamaha - S70XS