by AlabamaDidn'tGetAway » Mon Feb 18, 2013 9:55 pm
I think the light bulb went off for me regarding modes when I started learning fiddle tunes from notation. I was working on Salt Creek. The notation has 2 #s, thats the key of D. WTF is up with that? Every back porch picker worth his salt know Salt Creek is in A! The melody starts on an a, ends on an a, so do the chords. Yet these dot writing MF's say its in D! Well, the light went off and I realized its that pesky G chord. The b7. The tune keeps going there. The G note and therefore the G chord, the b7, is not a note in the A maj scale. Thats why Salt Creek is A Mixo. See, the dot writers dont really care where the tonal center is. They just expect you to play the dang dots. The tonal center then takes care of itself. But us ear players, we darn sure care. Thats when I learned "key", in a classical/dot readers world, means the key signature, not the tonal center, which is what us jammers generally refer to as the "key". The dot writers ask "how can we write this out with the fewest possible flats or sharps"? Turns out D major fits A mixo. The f# and the c# are called for in the key signature of D, and the g remains a natural note. So the dot writers use D maj. If they used Amaj, they'd have to use 3 sharps, the c#, the f#, and the g#, then put a flat sign by every g note!
My advice is dont over think modes. Its just an alteration of the major scale. I just think of mixo as the maj scale with a b7. Dorian is just a maj scale with a b3 and a b7. The minor scale is just the maj w a b3, figure out which dang 7th to play by ear. I dont worry about which minor scale its called, just what sounds good. The maj scale w just a few altered notes, your minor and maj pentatonic boxes(just stripped down maj or min scales w notes left out) and your pretty much covered. Learn the notes on your fretboard. Learn as many diff places to play all your chords as you can. Figure out the intervals of those chords, learn yer roots, 3rds & b3rds 5ths, maj7ths and b7ths. Then find the 4th, your prob gonna need it at some point in the tune. Then you only got just a few more note possibilites. The 2nd, the 6th, a passing b5, hell you'll hit those by accident. Pick a chord position, then hum a melody and play it. Rinse and repeat till you get too old for your fingers to move, and by then we're all done for I guess.