![]() ![]() This lesson should really broaden your playing vocabulary. If you did not know it already, this is the reason that the blues scale has a #4/b5 note added to it. In other words, they are a diminished 5th from each other so the note that is a b5 of Bb is E, and the note that is a b5 of E is Bb. You can do this because Bb and E are tritones of each other. For example, you can substitute an E13b5 for a E7, or you can substitute a Bb13b5 for an E7. For example you can substitute a Bb13 for a E9 chord.įor even more possibilities, you can substitute a dominant chord with a flat-five note added. You can substitute any dominant chord for any other dominant chord. Because all dominant chords (7th, 9th, or 13th) must contain the 3 and b7 notes, this subtitution process works every time.Īnother great thing about this substitution process is that you do not have to substitute a Dominant 7th chord for a Dominant 7th chord. This is why you can get the same notes for both chords. In other words, It is the same distance from the root note as it is from the root note’s octave. The neat thing about the tritone is that it divides the root note and octave in half. ![]() The reason that the notes are the same is because the interval between the 3 note and the b7 note is a diminished 5th (also called the tritone). That is why the chords can be substituted for each other. If you will notice, the 3 note and the b7 note are the same notes but switched around the chords.
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