Tyros 5 is the first 76 note keyboard I have owned. 61 note Tyros's first key is C1. The 76 key versions first note is E0. Is this a standard or does it vary among different manufacturers? It never occurred to me that my new keyboard's first note wouldn't be a C. I'm sure I'll get used to it but my left hand playing chords is missing many since I am used to C being the first key. Unless I change my usual chord inversions I really don't gain much in the upper keys playing styles as I do. Just wondering................. -charley