> He was quickly explaining the chords based on the diatonic scale — how the dissonance of the tri-tone in the 5-chord with the flat-7 is what makes it want to resolve to the 1. Within a minute, he started quizzing me.
> “If the 5-chord with the flat-7 has that tri-tone, then so does another flat-7 chord. Which one?”
> “Uh… the flat-2 chord?”
> “Right!"
What chords is he talking about (or did he mis-type)? I read "5-chord with flat-7" as G7 and "flat-2" as Dm7, but G7 and Dm7 don't share a tri-tone, only an interval. ?