In the song "If You Have To Ask" by the Red Hot Chili Peppers there is this instrumental funk interlude with a bunch of seventh and ninth chords and I want to understand this progression more by analysing it.
So the song is mainly in G natural minor, and the chords in the interlude are: G9 Gb9 F9 C7 Ebmaj9 Bb7 D7#9.
I've already figured out that it has the form of I I(b) VII IV VI III V (If we'd stick to the G minor key) and the guitarist keeps switching between G mixolydian, G natural minor and something that seems like G major with an augmented sixth.
I've figured out that G9 and F9 are in G mixolydian, C7 seems minorish, Bb7 is in G phrygianand D7#9 seems like G major with an augmented sixth
Am I going the right way? And if so, can someone help me connect the dots? Is this a common funk progression and could someone hint how these chords/modes are related?