16/11/2024
Here's a mode-based guitar study ... actually it is in the Key of D Major ... Particularly so for the "Verse" ... the "Chorus" does not change key, although it certainly benefits the improvisor if they view that section as a combination focus of E Dorian and A Mixolydian modes.
E Dorian is the 2nd mode of D Major, whilst A Mixolydian (also known as the "Dominant 7th Scale") is the 5th mode of D Major Scale.
When you think about it, that makes sense as the 5th chord, the "five chord", of the key of D Major, is a Dominant 7th type of chord. In this case, A Dominant 7th... matching perfectly with the A Mixolydian mode.
Why think about things this way? In any chord progression, there is the tonic chord and tonic note of the tonality to think about when drawing melodic lines during a solo...
Here, that tonic note is the note D, and the tonic chord is D Major 7th; the resolution chord, usually, potentially.
The "Chorus" section features a lot of E min9 type chord playing, and some of the A7 chord sound. So... there are two other tonic notes to think about there, when improvising. The note E, and the note A.
Interestingly, many improvisors choose to avoid playing the actual tonic note of the current chord-in-play unless they wish to illustrate a sense of resolution, musically. That could be just a temporary resolution or the completion of their solo. Even then, perhaps the 9th of the chord they complete their solo along with, could be a more musically interesting way of phrasing their realtime melody.