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The canonical chord would be a diminished 7th, in this case Bdim. That consists of B-D-F. The G7 is a G Major with a 7th added, so G-B-D-F. So it’s basically a Bdim with a G in the base. In the chord progressions I’ve seen Tony substitute a dominant 7th for the diminished chord more than a few times. I suspect it’s “easier to play” and/or “something that comes up more often.” But if you’re looking at the Chord Matrix from Fretboard Wizard and not expecting a G variant between the Am and the C, you’re right.
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This reply was modified 3 years ago by drew.sudell.
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This reply was modified 3 years ago by drew.sudell.
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This reply was modified 3 years ago by drew.sudell. Reason: fix typos
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This reply was modified 3 years ago by