My Guitar Notes 中文

G♭m6/9 — G♭ minor sixth added ninth chord

A minor triad with the sixth and the ninth added. The minor third is what separates it from the major 6/9, which otherwise uses the same added notes.

Symbol
Gbm6/9
Root
Gb
Quality
Minor sixth added ninth
Family
added
Notes
Gb Bbb Db Eb Ab
Degree formula
1 b3 5 6 9
Semitones from the root
0 2 3 7 9
Distinct pitch classes
5
Interval structure
Stacked from the root: 3 semitones, 4 semitones, 2 semitones, 5 semitones
Notation
Written m6/9. A tonic minor colour in jazz and in Brazilian music.
Key
Gb · Gb major / Eb minor key signature

Formula

The chord tones in order from the root, with the interval each one forms above it.

DegreeNoteSemitonesInterval from the root
1G♭0Perfect unison
b3B♭♭3Minor third
5D♭7Perfect fifth
6E♭9Major sixth
9A♭2Major second

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.

InversionBass noteDegree in the bassNotes above the bassSemitones above the bass
root positionG♭1G♭ – B♭♭ – D♭ – E♭ – A♭0 3 7 9 2
first inversionB♭♭b3B♭♭ – D♭ – E♭ – A♭ – G♭0 4 6 11 9
second inversionD♭5D♭ – E♭ – A♭ – G♭ – B♭♭0 2 7 5 8
third inversionE♭6E♭ – A♭ – G♭ – B♭♭ – D♭0 5 3 6 10
fourth inversionA♭9A♭ – G♭ – B♭♭ – D♭ – E♭0 10 1 5 7

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)NotesDegreesBassSpan (frets)Sounding strings
12-0-1-1-2-2Gb A Eb Ab Db Gb1 b3 6 9 5 1Gb26
22-4-4-2-4-4Gb Db Gb A Eb Ab1 5 1 b3 6 9Gb26
314-12-13-13-14-14Gb A Eb Ab Db Gb1 b3 6 9 5 1Gb26
42-4-1-2-2-4Gb Db Eb A Db Ab1 5 6 b3 5 9Gb36
52-4-1-2-4-4Gb Db Eb A Eb Ab1 5 6 b3 6 9Gb36
614-11-11-14-14-11Gb Ab Db A Db Eb1 9 5 b3 5 6Gb36

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

Related