Minor b6 (mb6), minor b13 (mb13) Chords, minor 7 add b13 (m7add13) - Diagrams and Charts

What Are Minor b6 Chords?

A minor flat sixth chord (mb6) is built with four notes, root (1), minor third (b3), perfect fifth (5) and minor sixth (b6). This is a minor triad with a b6 (a minor 6 interval from the root). Minor b6 chords are rarely identified as such, they are not common chords. Almost every time, they have enharmonic equivalents that make more sense in the harmony. For example, Fmaj7/A (most often found in real books and fake books) could be seen as an inversion of Amb6 (check out the diagrams below).

6th Chords Comparison

Here is a quick comparison between sixth chords.

minor 6 Chords 1 b3 5 6
6 chords 1 3 5 6
minor b6 chords 1 b3 5 b6

Notation and Symbols

Minor b6 chords can be written mb6, minorb6, minb6 or -b6

Related Scales

Related Chord Shapes

The six diagrams below show that minor b6 chords can be considered as maj7 chords with the third in the bass.

Minor b6 guitar chords

 

Major 7 chords third in the bass

Difference Between minb13 and min7addb13 Chords

Minor b13 chords are tetrad chords (aka 7th chords) including two extra notes the ninth (9) and the eleventh (11) with an altered one that is b13. The formual is 1 - b3 - 5 - b7 - 9 - 11 - b13). This means that theoretically b13 chords does automatically include the 7th, the 9th and the 11th. Because it is physically difficult to play all these notes on the guitar, some of them are removed as it is shown in the examples below.  Minor 7add13 chords contain a flat thirteenth (b13). There is no 9th and no 11th.

 

minor b13 chords 1 b3 5 b7 9 11 b13
minor 7 add b13 1 b3 5 b7 X X b13

 

Minor b13 chords

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Last edited: 03/14/2019