Abmmaj7

AbmMaj7 is Ab, Cb, Eb and G, a minor major seventh. The shape this page opens on is written x21143, lowest string first.

Note by note. Ab is the root, Cb is the minor third, Eb is the fifth and G is the major seventh.

Also written AbmM7, Abm(maj7), Ab-Δ7 or AbminMaj7. The same chord either way; which spelling you meet depends on who wrote the chart.

There are 6 common shapes for AbmMaj7 on the guitar, and 32 derived voicings in 4 families.

One note away. Change a single note of AbmMaj7 and you have Abm (with one note taken away), Abmaj7 (with one note moved), Abm6 (with one note moved), Abm7 (with one note moved), AbmMaj7b5 (with one note moved) or AbmMaj9 (with one note added).

The common shapes, written lowest string first: x21143, xx6443, 465444, xx6887, x-11-9-8-8-x, x-11-13-12-12-11.

Under the hand. None of the shapes for AbmMaj7 uses an open string, so every one of them is movable; the lowest sits at the 1st fret. 1 of the 6 needs a barre. Together they cover the neck from the 1st fret to the 13th.

Shell. Root, third and seventh: the guide tones fix the quality, so the fifth is dropped. That is what leaves a string free, so pick a tension to put on top. AbmMaj7 has 425xxx, 4x54xx, x-11-9-12-x-x, x-11-x-12-12-x.

Drop 2. A close-position chord with the second voice from the top lowered an octave. Sits on four adjacent strings. AbmMaj7 has xx1103, 3211xx, xx5444, 4654xx, xx6887, x-10-9-8-9-x, x-11-13-12-12-x, 15-14-13-13-x-x.

Drop 3. The third voice from the top lowered an octave. The dropped voice becomes the bass, which is why a string is skipped. AbmMaj7 has x2x143, 3x110x, x6x484, 4x544x, 7x688x, x-10-x-8-9-7, 11-x-9-12-9-x, x-11-x-12-12-11.

Open string. An open string left ringing against a fretted grip. Because it costs no finger, it sounds a note the closed shape has none left for -- a tension on top, or a pedal root underneath. Either a familiar grip with open strings added, or a shape so sparse the open strings carry the chord. These belong to their key rather than to a shape, so D, A, G and E have many and Eb a handful. AbmMaj7 has 4x300x, x6600x, x2300x, 3x300x, 7x600x.

Tensions. A shell of AbmMaj7, root, third and seventh, leaves a string free, and the tones that belong over it are the 9 (Bb), the 11 (Db) and the 13 (F).

What kind of chord this is. AbmMaj7 is a minor chord — root, minor third, fifth. minor chords on every root, and what they are for.

The common shapes and the derived voicings come from different places, and both are explained in where the chords and the theory come from.