Actually, It's a brand new S910 that I just took out of the box. I'm in 'FINGERED ON BASS' mode and I want to play a simple Bb/C chord.
Really, any chord with the 9th in bass turns the top chord into an 'add9' chord, but I don't want the arrangement playing add9, it gives a whole different flavor. Just want a simpler Bb arrangement with the bass note on C.