Determine a chord's harmonic function relative to a key center.
Key-dependent rule: a minor-7 chord on the tonic scale degree in a minor key
is Tonic (overrides the quality-based Subdominant label).
Blues I7 and all other chords keep their quality-based function.
Determine a chord's harmonic function relative to a key center.
Key-dependent rule: a minor-7 chord on the tonic scale degree in a minor key is Tonic (overrides the quality-based Subdominant label). Blues I7 and all other chords keep their quality-based function.