Irish bouzouki B chord (ADAD)B major: 6 9 9 9

Frets, low course to high: 6 9 9 9 (from the 6th fret) · B/D#

Sounds: D♯ B F♯ B · B is B, D♯, F♯ (1 · 3 · 5)

Found in: E major (V), B major (I), B mixolydian (I), F♯ major (IV), F♯ mixolydian (IV), D♭ mixolydian (♭VII)

No 3rd: B5 (2 4 2 4) leaves the 3rd out, so it backs B major, mixolydian, dorian and minor tunes alike.

With a capo: on the 2nd fret it’s 0 2 4 2 (frets counted from the capo), an open A shape.

Tuning ADAD: A D A D, low to high.

The link can’t set the tuning: the app starts on the Irish bouzouki in GDAD. Choose ADAD once in its Settings and it remembers.

B in session keys

E major (V, a main chord): E – A – E – B (a plain backing for many reels and jigs)
B major (I, a main chord): B – E – B – F♯ (a plain backing for many reels and jigs)
B mixolydian (I, a main chord): B – A – B