Module 27: Jazz Harmony
The Engine: ii-V-I
Classical music is V-I. Rock is I-IV-V. Jazz is ii-V-I. This standard modulation pushes the music forward through the Cycle of Fourths.
Example (C Major): Dmin7 (ii) -> G7 (V) -> Cmaj7 (I).

Guide Tones (3 & 7)
When soloing, you can't play every note. Target the Guide Tones.
- The 3rd: Tells us if the chord is Major or Minor.
- The 7th: Tells us if it is a Dominant or Major 7.
If you hit the 3rd and 7th, you 'outline the changes' perfectly.

Circle of Fourths
Jazz progressions move counter-clockwise on the Circle of Fifths (which is the Circle of Fourths). C -> F -> Bb -> Eb... This is the gravitational pull of harmony.

Color Tones (Extensions)
The 'Butter Notes'. Adding 9ths, 11ths, and 13ths makes sound rich and sophisticated.
C Major 9: C - E - G - B - D. That high D is the pretty note.
