I’m studying the concept of modal mixture and there’s one thing that I immediately got curious about.
Supposedly, the majority of POP music (rock, hip hop, r&b, country, etc) is a mixture of Major and Minor Keys. But Mixolydian and Lydian are the first introduction of a flat and a sharp. Using C Ionian as the “root mode”, C Mixolydian adds Bb and Lydian adds F# (aren’t these also technically the F Major and G Major keys?) Adding on one more flat/sharp, you get C Dorian (which is also Bb Major?) And then, there is no corresponding mode for D Major? After all of these we finally get to Aeolian with 3 flats which is Eb Major.
So technically, if a song is “in C Major (Ionian) & C Minor (Aeolian)” through the use of say Bb and Ab chords, isn’t it also “in Mixolydian and Dorian”? Wouldn’t that also make Mixolydian, Lydian, and Dorian “more consonant” than Aeolian if it’s exactly the same concept as modulating around the circle of fifths?