#2
I would like to learn how to make/find tritones too. Not sure what u mean by tritone subsition though...
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#3
Tritone substitution is substituting a (most of the time) dominant chord with another dominant chord a tritone away.

For example, the tritone substitution of G7, would be Db7 - because Db is a tritone away from G7, and because both chords share the same tritone interval between the third and seventh of the chord.

G7 - G - B - D - F. From B to F is a tritone.
Db7 - Db - F - Ab - Cb. From F to Cb is a tritone. (Keep in mind that Cb is enharmonic to B).

Most of the time tritone substitution is used to produce a chromatic bassline within the chord progression (especially in jazz).. the ii - V - I progression in C Major would be D-7 - G7 - Cmaj7. But if you substitute the G7 chord with a dominant chord a tritone away, you get D-7 - Db7 - Cmaj7 (ii - bII - I) and as you can see this produces a chromatic bassline which sounds smoother & more modern - which is the main reason for TT substitution, but there are other reasons.

Devon: To find the tritone of a note, count three whole steps (half an octave, diminished fifth, augmented fourth) away.. so from C to Gb would be a tritone, from G to Db would be a tritone etc..
Last edited by Johnljones7443 at Feb 17, 2007,