Coupla loose ends...Two songs on my original list that I claimed were in
"Dorian" mode.
1. "I Heard It Through The Grapevine". Nope, not "Dorian" in the least.
Two of the three major "hit" versions (Marvin Gay's original and Creedence
Clearwater's cover) substitute a i chord for a I chord in a few places
throughout but otherwise the structure of the song is characteristic of many
songs written in a MAJOR key.
Gladys Night and the Pips version (my fav; LOVE those Pips) avoid the whole
issue altogether by not doing the "i for I" substitution anywhere.
2. Santana's "Evil Ways". Plenty of chord sequences that look like ii-V
("Dorian"), but is it really? Let's give a listen to the original
recording:
http://www.youtube.com/watch?v=_tKIPuLfeKg
The chords in question are Gm - C. That sounds "Dorian", right? But wait,
what's that D7 toward the end of each verse? Let's write out the notes: Gm
= G Bb D; C = C E G; D7 = D F# A C.
Now let's put everything that's contained in the chords in order starting
with the G: G A Bb C D E F#. Compare with a "natural" G minor scale (key
of Bb): G A Bb C D Eb F. Compared with the natural minor, the sixth and
seventh degrees of the scale formed by the "Evil Ways" chords are raised a
half step. This defines, technically, the "ascending" melodic minor scale.
So here's gonjah's prototypical "melodic minor" song (see "The majority of
minor pop songs are written in:" thread), right? Well, not quite. Listen
to the vocal, and you'll hear plenty of natural F notes. So does that
indicate "Dorian" (as it would be technically if F rather than F# appeared
in the scale), or is it just a bluesy touch?
In any event, following the Lump's advice, I'd simply notate the song in Gm
(key of Bb) and indicate the natural Es and sharped Fs as accidentals.