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|
|minor b6 chords||1||b3||5||b6|
Notation and Symbols
Minor b6 chords can be written mb6, minorb6, minb6 or -b6
- Aeolian mode (sixth mode of the major scale)
- Harmonic minor scale.
- Phrygian b4 mode ( 3rd mode of the harmonic major scale)
Related Chord Shapes
The six diagrams below show that minor b6 chords can be considered as maj7 chords with the 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|
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Last edited: 03/14/2019