yeah man
all i know for the controll so far:
X: Change Visualization on the Guitar(?)
Y: switch Left for High Key when Left set to Low Key, and Right for Low Key when Right set to High Key (and so on)
Start: Show chart table (Nice)
Select: Turn Off DS Instantly (Really Nice so you can save these button up)
Left: Lowering Key
Right: Highering Key


Thats it, more?