Fo(b13) Diminished
The Fo(b13) chord is built from the notes F – Ab – Cb – Ebb – Db.
Piano sound loads on first tap.
Chord tones, one by one
FRoot
Root
The fundamental note the chord is built on — F.
AbThird
Minor third
Three semitones — makes the chord minor (darker, sadder).
CbFifth
Diminished fifth (♭5)
Six semitones — a flat fifth. Creates instability, typical of m7♭5 and diminished chords.
EbbSeventh
Diminished seventh (♭♭7)
Nine semitones — a doubly-flat seventh, found in fully diminished 7th chords.
DbExtension
Flat thirteenth (♭13)
A ♭13 — dark altered tension over a dominant chord.
🎼 Related scales
🎹 Modal analysis
This chord implies the Whole-half diminished scale.
🎸 Genres
Bebop jazz · Hard bop · Gypsy jazz