I cannot find through the search function the answer to this. Probably because I haven't asked the 'right' way. But Here goes on the a new thread. In the chord progression of 1, 6, 2, 5 and in the Jazz standard, "Ive got Rhythm", I cannot understand the Six chord. Is it a VI or a vi. Major or minor. I've seen it explained, in the key of Bb, like this. Bb, G7, Cm7, F7. And I've seen it explained like this. Bb, Gm7, Cm7, F7. Please explain.