How to play C#7b13: a dominant 7th flat 13 built on C#, with 1 voicing, the notes, and the intervals.
The first diagram is a common voicing: played at the first few frets. An X above a string means don't play it; an O means play it open.
| Note | C# | E# | B | A | D# |
|---|---|---|---|---|---|
| Interval | R | 3 | b7 | b13 | 9 |
C#7b13 is a dominant 7th flat 13 with C# as its root. The full theoretical spelling is C#, E#, G#, B, D#, F#, A. 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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