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Guitar chords · Dominant 13th

A♭13 chord on guitar (Ab13)

A♭13 (A♭ 13th) has six notes: A♭, C, E♭, G♭, B♭ and F, the , 3, 5, ♭7, 9 and 13.

Shapes

How to play A♭13

Strum a shape to hear it, or pick it one string at a time. R marks the ; the other numbers are the chord tones.

A♭13 has no common . Play it as the E shape at 4 or the A shape at fret 11. A keeps its fingering anywhere on the neck: slide it up or down and the , on the lowest played string, names the chord.

  • E shape · fret 4

    4fr××R♭7313A♭G♭CF
  • A shape · fret 11

    11fr××R♭7313A♭G♭CF
Name a shape you're holding: the chord finder

Notes and formula

What makes A♭13 dominant 13th

A 13th chord stacks the 13th (the 6th, an up) on a chord. Guitarists play the , 3rd, ♭7th and 13th: the 5th and 9th are optional, and the 11th is left out because it clashes with the 3rd. It is a rich dominant heard in jazz, blues and funk.

  • 1Root: the note the chord is named after. Keep it.
  • 3Essential: makes the chord what it is. Never drop it.
  • 5Optional: drop it first when you run out of fingers.
  • 11Left out: players skip it because it clashes.

The 3rd, the ♭7th and the 13th make A♭13 a 13th chord; you can leave out the 5th and the 9th. The 11th is left out: it clashes with the 3rd.

  1. A♭Rroot
  2. C3essential
  3. E♭5optional
  4. G♭♭7essential
  5. B♭9optional
  6. F13essential
EADGBE0135791215A♭A♭A♭A♭A♭A♭A♭FG♭B♭CE♭FG♭B♭CE♭FG♭B♭CE♭FG♭B♭CE♭FB♭CE♭FG♭B♭CE♭FG♭B♭CFG♭B♭CE♭FG♭
  • A♭, the root
  • Other chord tones

A♭13 usually resolves to D♭ or D♭m, the chord a 5th below: the V13–I move.

A♭13 and G♯13 are the same chord with two names: same , same sound. Which one you see depends on the key the song is written in.

Keys

Keys with A♭13

A♭13 belongs to two keys: D♭ major (V13) and B♭ minor (VII13).

Numerals follow the key's own scale, so III, VI and VII in a minor key are its own major chords. A ♭ or ♯ in front marks a chord from outside the key. How Roman numerals work

Slash chords

A♭13 over another bass note

A keeps A♭13 on top and puts another note in the bass: the letter after the slash is the lowest note you play.

  • A♭13/C

    A♭13 with its 3rd, C, in the bass.

  • A♭13/E♭

    A♭13 with its 5th, E♭, in the bass.

  • A♭13/G♭

    A♭13 with its ♭7th, G♭, in the bass.

Questions

A♭13, in short

What notes are in the A♭13 chord?
A♭13 (A♭ 13th) has six notes: A♭, C, E♭, G♭, B♭ and F, the , 3, 5, ♭7, 9 and 13.
How do you play A♭13 on guitar?
A♭13 has no common . Play it as the E shape at 4 or the A shape at fret 11.
What key is A♭13 in?
A♭13 belongs to two keys: D♭ major (V13) and B♭ minor (VII13).
Is A♭13 the same as G♯13?
Yes: same frets, same sound, different name. A♭13 is the spelling in D♭ major and B♭ minor; G♯13 in C♯ major and A♯ minor, which most players write as D♭ major and B♭ minor.
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