G♭maj13 — G♭ major thirteenth chord
A major seventh chord with the ninth and the thirteenth added. The eleventh is normally left out because it clashes with the major third.
- 1 = G♭
- 3 = B♭
- 5 = D♭
- 7 = F
- 9 = A♭
- 13 = E♭
- Symbol
- Gbmaj13
- Root
- Gb
- Quality
- Major thirteenth
- Family
- extended
- Notes
- Gb Bb Db F Ab Eb
- Degree formula
1 3 5 7 9 13- Semitones from the root
0 2 4 7 9 11- Distinct pitch classes
- 6
- Interval structure
- Stacked from the root: 4 semitones, 3 semitones, 4 semitones, 3 semitones, 7 semitones
- Notation
- Written maj13. A tonic chord in jazz voicing; in practice the fifth is often dropped so the seventh and thirteenth can sit close together.
- Key
- Gb · Gb major / Eb minor key signature
Fingering charts
The library holds 5 fingerings of this chord and all of them are shown, in the library’s own order. Several fingerings of one chord is normal: the same notes can be stopped at different positions and on different strings.
Formula
The chord tones in order from the root, with the interval each one forms above it.
| Degree | Note | Semitones | Interval from the root |
|---|---|---|---|
| 1 | G♭ | 0 | Perfect unison |
| 3 | B♭ | 4 | Major third |
| 5 | D♭ | 7 | Perfect fifth |
| 7 | F | 11 | Major seventh |
| 9 | A♭ | 2 | Major second |
| 13 | E♭ | 9 | Major sixth |
Inversions
An inversion is the same set of notes with a different one in the bass. The last column gives the distance of each note above the bass note, in semitones.
| Inversion | Bass note | Degree in the bass | Notes above the bass | Semitones above the bass |
|---|---|---|---|---|
| root position | G♭ | 1 | G♭ – B♭ – D♭ – F – A♭ – E♭ | 0 4 7 11 2 9 |
| first inversion | B♭ | 3 | B♭ – D♭ – F – A♭ – E♭ – G♭ | 0 3 7 10 5 8 |
| second inversion | D♭ | 5 | D♭ – F – A♭ – E♭ – G♭ – B♭ | 0 4 7 2 5 9 |
| third inversion | F | 7 | F – A♭ – E♭ – G♭ – B♭ – D♭ | 0 3 10 1 5 8 |
| fourth inversion | A♭ | 9 | A♭ – E♭ – G♭ – B♭ – D♭ – F | 0 7 10 2 5 9 |
| fifth inversion | E♭ | 13 | E♭ – G♭ – B♭ – D♭ – F – A♭ | 0 3 7 10 2 5 |
Playable voicings
These shapes were found by searching the fretboard of a standard-tuned guitar (E A D G B E) rather than copied from a chord book. The search allows every string to sound or to be muted, rejects any shape with a muted string between two sounding strings, rejects any shape whose fretted notes span more than four frets (a five-fret window), requires every chord tone to be present, and then sorts what remains with root-position shapes first and the most compact, lowest shapes next. The shapes shown are the first six of that ordering; other orderings are possible at the same frets.
| # | Shape (low string first) | Notes | Degrees | Bass | Span (frets) | Sounding strings |
|---|---|---|---|---|---|---|
| 1 | 2-1-1-1-2-1 | Gb Bb Eb Ab Db F | 1 3 13 9 5 7 | Gb | 1 | 6 |
| 2 | 14-13-13-13-14-13 | Gb Bb Eb Ab Db F | 1 3 13 9 5 7 | Gb | 1 | 6 |
| 3 | 2-4-3-3-4-4 | Gb Db F Bb Eb Ab | 1 5 7 3 13 9 | Gb | 2 | 6 |
| 4 | 2-6-3-3-2-4 | Gb Eb F Bb Db Ab | 1 13 7 3 5 9 | Gb | 4 | 6 |
| 5 | 2-6-6-6-6-6 | Gb Eb Ab Db F Bb | 1 13 9 5 7 3 | Gb | 4 | 6 |
| 6 | 14-11-11-10-11-11 | Gb Ab Db F Bb Eb | 1 9 5 7 3 13 | Gb | 4 | 6 |
Shape numbers run from the lowest string to the highest, so the left-hand number is the sixth string (low E) in standard tuning. Multiple shapes are listed because a chord can be voiced several ways, and because a lower position is not always the better sounding one.
Related chords and scales
- KeyEverything in Gb
- ScaleGb major
- ChordGbmaj9
- ChordGb
- ChordGb7
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