Bbo(#13) Diminished
The Bbo(#13) chord is built from the notes Bb – Db – Fb – Abb – Ab.
Piano sound loads on first tap.
Chord tones, one by one
BbRoot
Root
The fundamental note the chord is built on — Bb.
DbThird
Minor third
Three semitones — makes the chord minor (darker, sadder).
FbFifth
Diminished fifth (♭5)
Six semitones — a flat fifth. Creates instability, typical of m7♭5 and diminished chords.
AbbSeventh
Diminished seventh (♭♭7)
Nine semitones — a doubly-flat seventh, found in fully diminished 7th chords.
AbExtension
Extension (22 st)
An upper extension 22 semitones above the root.
🎼 Related scales
Dorian ♯4 (Ukrainian)harmonic minor a perfect 4th below
🎹 Modal analysis
This chord implies the Dorian ♯4 (Ukrainian) scale; its characteristic note is the ♯4 / ♯11 (the Ukrainian color). It is a mode of the harmonic minor a perfect 4th below.
🎸 Genres
Gypsy jazz · Roma music · Klezmer · Classical