|
Chopin Nocturne
When Chopin wrote his Nocturne he probably never dreamed that it would become so well known.
|
|
The Tritone, Substitution, Cycle 4
(22 Jan 04)
Movable chord forms: Special cases of Altered chords
Lets talk about our old friend the Dim7 chord, This guy is two tritones a minor third apart or a stack of minor third's if you prefer. This guy is a truly special case as it is completely symmetrical every inversion is a replica of the previous one, because it is built on all minor thirds.
First of all lets look at the Dim7 as though it was the 3 5 b7 and b9 of a Dom 7b9 chord.
So the tritone moving down in half steps will once again give us Cycle four in this case using Dom 7b9.
Dim7 chords replicate themselves through inversion, in other words moving them up in steps of a minor third creates the same chord just inverted, (the chord up a minor third is just an inversion of the same chord you started with).
So you can move up a minor third (same chord) then down a half step to create cycle four movement. This results in up a major second. So I Dom7b9 up major second creates IV Dom7b9.
You can also move down an minor third (same chord) and then down another half step which results in down a major third and this will result in Cycle four movement.
Cycle Four Summary
- Move down a half step.
- Move up a whole step.
- Move down two whole steps.
|
|
|
Tritone Symmetrical Voicings >> |
|
|
|
|
