B♭m7♭9 8-string guitar chord

How to play B♭m7♭9 on 8-string guitar

The most common way, the first shape above: your middle finger on the F♯ string at the 4th fret, your ring finger on the low E string at the 4th fret, your ring finger on the A string at the 4th fret, your index finger on the D string at the 3rd fret and your little finger on the G string at the 4th fret. Don’t play the low B, high B and high E strings.

From the F♯ string 4 x 4 4 3 4 x x (x: not played, 0: open)

What notes are in B♭m7♭9?

B♭m7♭9, B♭ minor seventh flat nine, is B♭, D♭, F, A♭ and C♭: the root (B♭), the minor third (D♭), the perfect fifth (F), the minor seventh (A♭) and the flat ninth (C♭). Its formula is 1 ♭3 5 ♭7 ♭9.