Bbdim13 Diminished
The Bbdim13 chord is built from the notes Bb – Db – Fb – Abb – C – Eb – G.
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.
CExtension
Ninth (9)
A 9th — colorful extension a whole step above the octave.
EbExtension
Eleventh (11)
An 11th — a suspended, airy color on top of the chord.
GExtension
Thirteenth (13)
A 13th — full, rich top extension.
🎼 Related scales
🎹 Modal analysis
This chord implies the Whole-half diminished scale.
🎸 Genres
Bebop jazz · Hard bop · Gypsy jazz