Construction
B♭ Diminished Major 7th = Root + Minor 3rd + Diminished 5th + Major 7th = B♭, D♭, F♭, A
| Note | Interval | Degree |
|---|---|---|
| B♭ | Root | 1 |
| D♭ | Minor 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♭ | black | 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 Diminished Major 7th chord is built from symmetrical or ambiguous intervals, so it doesn't belong to a single key and has no key signature of its own.
Chords in the Key of B♭ Major
These are the triads built on each degree of B♭ Major:
B♭ Diminished Major 7th : Frequently Asked Questions
What is the B♭ Diminished Major 7th chord on piano?
The B♭ Diminished Major 7th chord contains the notes B♭ – D♭ – F♭ – A. On piano, play these notes together to sound the chord.