How to play Ab7b13: a dominant 7th flat 13 built on Ab, with 1 voicing, the notes, and the intervals.
The first diagram is a common voicing: played at the 10th fret. An X above a string means don't play it; an O means play it open.
| Note | Ab | C | Gb | Fb | Bb |
|---|---|---|---|---|---|
| Interval | R | 3 | b7 | b13 | 9 |
Ab7b13 is a dominant 7th flat 13 with Ab as its root. The full theoretical spelling is Ab, C, Eb, Gb, Bb, Db, Fb. This voicing omits the 5th and 11th, the tones guitarists drop first when fitting a chord onto six strings. A note on 13th chords: the root, 3rd, 7th, and 13th are generally considered sufficient in practice, although the technical definition spells the 9th and 11th as part of the chord too.
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