Fred, I think he means "I played the notes G, B flat, and F." If this is so, he's missing the D, which is the fifth. The chord will still show as a G-7, but the bass won't parse the root and five. Is this right? With an altered bass line, the chord will sound different.
When I play G plus Bb and F
to the left of G, as Bob stated in his original message, in multi-finger mode, the keyboard displays Bb6. So that's not the right combination.
When I play G plus Bb and F to the right of G, I see Gm7 displayed on the screen, but I still don't hear any difference between this and any other Gm7 combination.
Perhaps the confusion comes from the difference between single-fingered mode, and multi-finger. In single-finger mode, playing a
any black key below the root will generate a minor chord, and any black key plus any white key will generate a m7 chord. In multi-finger mode, it has to be the
adjacent black and/or white key.
But it's a shame we have to spend so much time guessing at what Bob means, when this easily could have been cleared up with a clearer message.
Cheers,
Fred