SUBSTITUTE
Using Extended Chords
WITH RICHARD BARRETT
LAST ISSUE we looked at the basic principle of how chords are extended and altered by adding extra notes from the scale and raising or lowering them to change the sound. Going up past the original octave, we enter the‘compound’ octave, starting with the 9th. Traditionally, the 10th (though it does exist as a two-note‘interval’) is not used within the conventions of chord naming, as it is a duplicate of the 3rd and its function within the chord doesn’t change significantly unless it’s used as the lowest note. That takes us on to the 11th and the 13th, the most extended chord available.