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C Diminished Major 7th

Notes: C – E♭ – G♭ – B
Degrees: 1 – ♭3 – ♭5 – 7
Also written: Cdim(maj7), C°M7Raise E♭ to E and it is Cmaj7♭5; raise G♭ to G and it is Cm(maj7). C and B do not move.

Construction

C Diminished Major 7th = Root + Minor 3rd + Diminished 5th + Major 7th = C, E♭, G♭, B
NoteIntervalDegree
CRoot1
E♭Minor 3rd♭3
G♭Diminished 5th♭5
BMajor 7th7

How to Play the C Diminished Major 7th

Right Hand (RH)

Place your right hand over the keys with the thumb on the root. Use the fingering: 1 – 2 – 3 – 5

Left Hand (LH)

For the left hand, start with your pinky on the root. Use the fingering: 5 – 3 – 2 – 1

C Diminished Major 7th : Frequently Asked Questions

What is the C Diminished Major 7th chord on piano?
The C Diminished Major 7th chord contains the notes C – E♭ – G♭ – B. On piano, play these notes together to sound the chord.

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