B♭ augmented (B♭aug) chord on mandolin

Looking for the B♭aug chord on mandolin? It is an augmented triad (two major thirds), made of three notes: B♭ – D – F♯. The same chord with a different spelling: A♯ augmented (A♯aug).

Dots show:

Basic shapeeasy

Position 3medium

Position 6medium

Position 8medium

Tap a string on a diagram to hear just that string. The sound is generated in your browser with a physical string model.

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What the B♭aug chord sounds like

An augmented triad is two stacked major thirds. It sounds floating, dreamlike and unresolved, and is often a passing chord (e.g. C → Caug → F or Am).

Notes of the B♭aug chord

Degree	Note	Interval from the root
1	B♭	root
3	D	major third (4 semitones)
5	F♯	augmented fifth (8 semitones)

How to play it – with fingering

Basic shape

String 1 (E): fret 2, middle finger (F♯5)
String 2 (A): fret 1, index finger (B♭4)
String 3 (D): open (D4)
String 4 (G): fret 3, ring finger (B♭3)

Position 3

String 1 (E): fret 6, little finger (B♭5)
String 2 (A): fret 5, ring finger (D5)
String 3 (D): fret 4, middle finger (F♯4)
String 4 (G): fret 3, index finger (B♭3)

Position 6

String 1 (E): fret 6, index finger (B♭5)
String 2 (A): fret 9, little finger (F♯5)
String 3 (D): fret 8, ring finger (B♭4)
String 4 (G): fret 7, middle finger (D4)

Tuning: G D A E, like a violin; every note is a pair of strings that you fret together. In the diagram, × means the string is not played, and a circle means an open string.

Which keys is it in?

The B♭aug chord is built from the notes of these keys (for minor keys, both the natural and the harmonic minor are considered):

G minor: III+

Similar chords and substitutes

If B♭aug is too hard, or you want a different colour in the same spot, these chords are worth a try.

Substitutes (by function)

B♭ – the raised fifth falls back to a perfect fifth
E♭ – as a passing chord it resolves here (V+ → I)

Same notes

Daug – the same notes with a different root
F♯aug – the same notes with a different root

Frequently asked questions

What notes are in the B♭aug chord?

B♭, D, F♯. The root is B♭; the intervals of the other notes from the root: major third, augmented fifth.

What is the easiest way to play B♭aug on mandolin?

The easiest shape above is “Basic shape”, rated easy. We show 4 shapes, from open and easy versions to movable barre shapes higher up the neck.

How do I read the chord diagram?

Strings run from the lowest (left) to the highest (right) – tick “Left-handed” to mirror it. Rows are frets; a number at the side shows the starting fret. Dots are fingers (1 index, 2 middle, 3 ring, 4 little), a long bar is a barre, × means don't play that string and ○ means play it open.

Why do some songbooks write H instead of B?

In German and Central European notation, H is the note B, and B is the note B♭. So a “B” chord in a German or Hungarian songbook is B♭ in English notation, and an “H” chord is B. Always check which notation your chord chart uses.