B♭ Minor 9th
Also Known As
Hear the B♭ Minor 9th chord played for you.
B♭m9
B♭ – D♭ – F – A♭ – C
Formula:R-m3-P5-m7-M9
Intervals:P1-m3-P5-m7-M9
Scale Degrees:1-b3-5-b7-9
Introduction
The B♭ Minor 9th chord is a five-note chord made up of B♭, D♭, F, A♭, and C. It is built from a root, minor third, perfect fifth, minor seventh, and major ninth.
The Bb Minor 9th piano chord (Bbm9) consists of the notes Bb, Db, F, Ab, C. It is a minor 7th chord with an added major 9th, giving it a dark yet lush character widely used in jazz, soul, and R&B progressions. Formula: R-m3-P5-m7-M9 | Scale degrees: 1-b3-5-b7-9.
Notes
Key Signature
The key of Bb Minor 9th has 5 flats.
B♭E♭A♭D♭G♭
Order of flats
Flats are added in a fixed order — the reverse of the sharp order. Each new flat key adds the next flat on the list.
B♭E♭A♭D♭G♭C♭F♭
Mnemonic: Battle Ends And Down Goes Charles’ Father
Chords in the Key of B♭ Minor
These are the diatonic triads built on each degree of the B♭ minor scale:
C
D
E
F
G
A
B
C
D
E
F
G
A
B
i — B♭ Minor (minor)
Theory: Intervals
Formula: R-m3-P5-m7-M9
Intervals: P1-m3-P5-m7-M9
The B♭ Minor 9th is built by stacking intervals from the root note. The formula R-m3-P5-m7-M9 describes the scale degrees used. The intervals P1-m3-P5-m7-M9 show the distance between each note in the chord.
B♭ Minor 9th — Frequently Asked Questions
What notes are in the Bb Minor 9th chord?
The Bb Minor 9th chord (Bbm9) contains five notes: Bb (root), Db (minor third), F (perfect fifth), Ab (minor seventh), and C (major ninth). It is Bbm7 with an added ninth.
How does Bbm9 differ from Bb9?
Bbm9 has a minor third (Db). Bb9 has a major third (D). Bbm9 is dark and smooth; Bb9 is dominant.
How is Bbm9 used in music?
Bbm9 is the ii in Ab Major (Bbm9–Eb13–Abmaj9) — a common jazz ii–V–I. It appears in jazz, R&B, and gospel.
What songs use Minor 9th chords?
Minor 9th chords define neo-soul and lo-fi. Bbm9 is common in jazz and R&B in Ab Major.
How does Bbm9 differ from Bbm7?
Bbm9 adds the ninth (C) for richer colour.
Do I need to play all five notes?
No — drop the fifth: Bb–Db–Ab–C is practical.
Practice Tips
- Play Bbm7 then add C — hear the ninth open the chord.
- Drop the fifth: Bb–Db–Ab–C is standard.
- Practice Bbm9 → Eb13 → Abmaj9 for the ii–V–I in Ab.
- Bbm9 in R&B and gospel adds richness to the ii chord.
- Rootless: Db–F–Ab–C (Dbmaj7 shape over Bb bass).
- Bbm9 is one of the most common m9 chords in jazz standards.
Related Tools
Chord FinderLook up any chord — see the notes, hear it, and play along.Chord DrillTimed drills to build speed and recognition across all chord types.Practice RoomPlug in a MIDI keyboard and get real-time feedback on every chord and scale.Circle of FifthsVisualize key relationships, relative minors, and key signatures.MIDI MonitorLive MIDI message stream with note names, velocity, and a scrolling staff.