Hey Guys,
Don't overcomplicate this thing.
There was a recent post that deals with diatonic seventh chords:
http://www.guitarmasterclass.net/guitar_fo...showtopic=21015Here's the easiest was to pull off what you're trying in C Major...
First, realize that the seventh chords which are diatonic to the C Major scale are the following C Major 7 (CEGB), D Minor 7 (DFAC), E Minor 7 (EGBD), F Maj 7 (FACE), G Dominant 7 (GBDF), A Minor 7 (ACEG), and B-7b5(BDFA, sometimes called half-diminished). By overlaying the C Major scale, you can see how this works....
C D E F G A B
E F G A B C D
G A B C D E F
B C D E F G A
CMaj7 DMin7 EMin7 FMaj7 G7 AMin7 BMin7
Notice that each of these "layers" is just the C major scale starting from a different note. Also notice that I've rotated the scale so that it's stacked in thirds. This is how most chords are built.
So, to keep things simple. Now that you've figured out that the C Major scale sounds good over the C Major 7 chord (which is exactly right!), try D Dorian (which is not quite what you had indicated in your fingering above) over the D Minor 7.
Start out by using the same fingering you did for C Major, but start on the second note (D) and play until you hit the next D.
Based on your fingering for C Major above this would be
E---------------------------------------------------
B-----------------------------------------------3--(Back at D!)
G-------------------------------2----4----5--------
D-------------2----3-----5-------------------------
A--(3)---5-----------------------------------------
E---------------------------------------------------
Skip the C, third fret on A string for now, and start your same C Major scale fingering on the fifth fret as indicated.
Yeah, in time it'll be cool to play melodic and harmonic minor over the certain minor seventh chords in certain situations, but it's really key to spend some time playing diatonically over them at first to understand the underlying harmony.
I hope this makes some sense.
_Bryan
Sorry, my spacing didn't really work out the way I wanted on the stacked scale diagram above. Each chord below it (CMaj7, DMin7, etc....) should line up with one of the columns above.