Minor 6th chords
The Minor 6th chord is a four-note chord that adds the sixth degree note in the major scale to the minor triad. By comparing Cm with Cm6 we can see that the notes changes from C, Eb, G to C, Eb, G, A. The minor sixth chord can be a substitute for a common minor, but can sound somewhat dissonant depending on the musical circumstances (it often diverges from the relevant musical key).
Minor 6th chords
These are, generally, chords in open position, with Cm6 as an exception which is a closed chord (having no loose strings). Also noticeable is that Cm6 and Fm6 are played with alternative bass notes, see different versions below. Fm6 can be played with the root note in the base by using the thumb on the sixth string and muting the fifth on the same time.
Minor 6th with flats and sharps
Additional chords in this category:
C sharp / D flat m6: 678696
D sharp / E flat m6: XX1312
F sharp / G flat m6: XX4645
G sharp / A flat m6: XX6867
A sharp / B flat m6: 688686
The minor 6th chord can be found on the ii degree in a major scale. In C major, this would be Dm6 whereas Em9 and Am9 would be non-diatonic chords because of the C# and F# notes, respectively.
The minor sixth is built with the formula 1-b3-5-6 (root, minor 3rd, perfect 5th and major 6th).
Chord constructionCm6 x - x - Eb - A - C - G
Dm6 x - x - D - A - B - F
Em6 E - B - E - G - C# - E
Fm6 x - x - D - Ab - C - F
Gm6 G - Bb - E - G - D - E
Am6 x - A - E - A - C - F#
Bm6 x - x - D - G# - B - F#
Guitar versions of the chord
Notes in chordCm6 C - Eb - G - A
Dm6 D - F - A - B
Em6 E - G - B - C#
Fm6 F - Ab - C - D
Gm6 G - Bb - D - E
Am6 A - C - E - F#
Bm6 B - D - F# - G#
The intervals are 1 – b3 – 5 – 6
Movable minor 6th chord
The Minor 6th can be played as a barre chord. The diagram below shows a barre shape based on the Em6 shape with the root note on the 6th string.
To play, for example F#m6, the short notation is: 244242.
Voicings with bass note on 6th string
Here is a movable voicing for the minor sixth with the root on the lowest string.
Dm6: 10 X 9 10 10 10
Em6: 12 X 11 12 12 12
Voicings with bass note on 5th string
If you want to play the minor sixth with the bass note on fifth string, here are some voicings. Notice that the two shapes are movable. Concerning Gm6, Am6 and Bm6 the root note is note the same as the bass note.
Bm6: X 9 9 11 9 10
Minor 6th chord in open position
Here are additional shapes in open position for this chord category:
G#m6/D# / Abm6/Eb7: XX1101
Here are chord sequences that include the minor 6th:
G6 - Am6 - Bm7
Amaj9 - Bm6 - D6 - E
G - Dm6 - E7 - Am7 - D7 - G
Notice that the Dm6 fits well before E7 since both include a B note, which Dm doesn't. In the second progression, Amaj9 can be played as X02100.
Minor 6th chords work as ii, but not as iii and vi chords (atonal). So, for example, in C major key, Dm6 is an viable (diatonic) option. This is the reason for this chord category to be less used compared to minor seventh.
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