Tritones are the 3rd and 7th of a chord. The most efficient and musical method of right hand fill for any 7th chord is to add the Tritones below the melody. The left hand only has to provide the root of the chord.
In music, the interval of the diminished fifth, exactly half the octave, and considered in the Middle Ages to be the moral antithesis of the octave's perfect consonance, or ‘diabolus in musica’ (devil in music).
Sounds scary? Hear for yourself and find out why Tritones were banned from Christian music several hundred years ago.In today's modern age tritones have been embraced in all modern music and in some of your favorite songs.
Tritones are just another way to play a chord or to use as a passing tone.
For example in the key of Ab
Let's say you are playing a 1-7-6 progression and you want to play a tritone.
In other words you are going from the Ab to the G to the F
To use a tritone as a passing tone you would play
L.H/R.H
E Bb/ Eb Ab ( Represent's the 3 which is C)
This chord you would play it just before you reach to the F minor chord.
Let's recap
Tritone is the third and the major 7
Can be used for a passing note (see above)
Can be used as a replacement for an chord
Note: For more information on Tritones I would highly recommend that you check out GK Urban 600
Learn To Play Contemporary Tritones