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Originally Posted by Jeralya Yup. My jazz theory is pretty garbage, so I guess I will start there- my theory teaching is almost entirely classical. |
Quick explanation you if interested you can find more info on the inet.
Parallel key and Modal Interchange is simply borrowing chords from another scale of the same parent. Parallel Minor lets say you are writing a song in C Major you borrow chords from C Minor.
C major chords
Cma7 Dmi7 Emi7 Fma7 G7 Ami7 Bmi7b5
C minor chords
Cmi7 Dmi7b5 Ebma7 Fmi7 Gmi7 Abma7 Bb7
As you can see some chord change families, and others the root is lowered a half-step.
Modal Interchange is same type thing except instead its a Parallel Mode so in C major borrow chord from C Dorian.
I won't go into explaining it here grab a theory book for Secondary Dominants. Quickly setting up a chord with its V7 chord. So in C major the song is going to a Dmi7. Before the Dmi7 play a A7 to set it up.
One last fast one. Change minor 7 chords to dominant 7 chords. So instead of Ami7 then use a A7.
But remember theory is mainly a way analyze or put labels on things so they can be remembered and used again. But when writing it's important to forget theory and just try things. If that isn't working then pull out the theory to get ideas to try. Theory isn't rules that must be followed, it is another tool to use as necessary and a lanuage to communicate with.