Renesongs wrote
This would be better understood if you were able to listen and hear the subtle differences but here goes. A little background. Every Scale has a set of Major, Minor and Dominant chords that match them perfectly. The classical major scale has I-Maj II-min, III-min, IV-Maj V-7 VI-min VII-min7(-5) e.g. C / Dm / Em / F / G7 / Am / Bm7-5 are the chords of C. By far the most predominant progression about in contemporary music is the I/IV/V ( C / F / G) and it's minor counterpart VI/II/III (Am / Dm / Em).
Your progression D5/G5/A5 could pass itself off as a I/IV/V D/G/A which puts it in the key of D (E is Dorian) or it could pass as VI/II/III (Dm/Gm/Am) which puts it in the Key of F (G is Dorian).
However if you say that D Dorian works well then you are in the key of C maj which makes your progression a II/V/VI which suggest that your chords should really be (Dm/G7/Am) an example of this progression is Santana's Black Magic Woman lead is played in D dorian although is more like (Dm/Am/Dm/G7/Dm/Am/Dm/ -)
I know this topic is way dead. But in light of the new lesson on modes, i suggest everyone read through this topic and specifically this post here. VERY well worded and VERY helpful.
