Construction
B♭ Major 7♭5 = Root + Major 3rd + Diminished 5th + Major 7th = B♭, D, F♭, A
| Note | Interval | Degree |
|---|---|---|
| B♭ | Root | 1 |
| D | Major 3rd | 3 |
| F♭ | Diminished 5th | ♭5 |
| A | Major 7th | 7 |
Fingering
| Note | Key color | Right hand | Left hand |
|---|---|---|---|
| B♭ | black | index finger (2) | little finger (5) |
| D | white | middle finger (3) | ring finger (4) |
| F♭ | white | ring finger (4) | middle finger (3) |
| A | white | little finger (5) | index finger (2) |
Right hand: index finger (2) on B♭, middle finger (3) on D, ring finger (4) on F♭, little finger (5) on A.
Left hand: little finger (5) on B♭, ring finger (4) on D, middle finger (3) on F♭, index finger (2) on A.
Key Signature
A chord has no key signature of its own, but the B♭ Major 7♭5 is the tonic (I) chord of B♭ Major, whose key signature has 2 flats (B♭, E♭).
B♭E♭
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♭ Major
These are the triads built on each degree of B♭ Major:
B♭ Major 7♭5 : Frequently Asked Questions
What is the B♭ Major 7♭5 chord on piano?
The B♭ Major 7♭5 chord contains the notes B♭ – D – F♭ – A. On piano, play these notes together to sound the chord.