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					Originally Posted by DJHeadUp
					
				 EDIT:  im also reeeealy getting into jazz now, i listen to it almost every night on the radio on my way home from work, i love some of these groups theyre playing, have you written any jazz improv setups yet?
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 Yeah, i've learned this year that jazz really breaks every classical theory rule out there.  For example, classical pieces are set in a certain key (D Major or F minor).  Jazz is totally opposite.  They just put in chords that make some sort of progression.
The easiest jazz progression is the 12 bar blues.  If you were to create a G blues it would look like this:
[code:02ab1]4 measures of a G7 chord which would be known as tonic 
2 measures of C7 chord which would be called (Submediant or IV [roman numerals for 4])
2 measures of G7 (tonic again)
Then 1 measure of D7 (which is called dominant or V for 5) and then 1 measure of C7.
Finally 2 of G7.
You can insert things called ii-V-I's which are really common in jazz.[/code:02ab1]
The progression is based off of one scale...it's really hard to explain it all in a way.  I'm working on a couple jazz pieces though.  I'll post some more of my stuff up.