How to play Bb7b13: a dominant 7th flat 13 built on Bb, with 1 voicing, the notes, and the intervals.
The first diagram is a common voicing: an open-position shape using 1 open string, played near the nut. An X above a string means don't play it; an O means play it open.
The same chord in other positions on the neck: movable shapes transposed to Bb. Open any of them in the Diagram Maker below to adjust the fingering.
| Note | Bb | D | Ab | Gb | C |
|---|---|---|---|---|---|
| Interval | R | 3 | b7 | b13 | 9 |
Bb7b13 is a dominant 7th flat 13 with Bb as its root. The full theoretical spelling is Bb, D, F, Ab, C, Eb, Gb. 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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