Smart Chord is very different from AI fingering . It is a great option . I wonder why it was left off the sx700 and 900
Yamaha’s description .
Smart Chord will allow novice users to trigger chords within a user-determined key and music genre with one finger. This means that once you tell the keyboard what key you’re playing in and what genre of music you’re playing in, it will automatically determine the type/character (major, minor, diminished, 7th or dominant, etc.) of the chords triggered for you. The steps on how to successfully use the Smart Chord function are detailed on p.31 of the Owner’s Manual, and are outlined below: