Finger Positions

Root Note D#

Name D# diminished seventh over B

Intervals 1P-3m-5d-7d

Relative Minor Cm

Notes B, D#, F#, A, C

Aliases D#dim7, D#°7, D#o7

How to play the D#dim7/B Chord

The D#dim7/B is a fundamental dominant chord in guitar music. To play this chord correctly, ensure your fingers are placed precisely on the frets indicated in the diagram above.

Music Theory Analysis

From a theoretical perspective, the D# diminished seventh over B is built using the 1P, 3m, 5d, 7d intervals. In the key of D# Major, this chord functions as the I chord.

Common Progressions

In music composition, the D#dim7/B chord is often used to create tension or resolution.

I-V-vi-IV

D# → A# → Cm → G#

vi-IV-I-V

Cm → G# → D# → A#

The Diatonic Family

Understanding the "family" of chords that belong to D# helps with transposition and ear training.

Triads

D# Fm Gm G# A# Cm Ddim

7ths

D#maj7 Fm7 Gm7 G#maj7 A#7 Cm7 Dm7b5

Scale Compatibility

View All Scales

Diminished Ultralocrian Locrian 6 Dorian #4 Lydian Diminished Hungarian Major Lydian #9 Half-Whole Diminished Composite Blues Messiaen's Mode #7 Chromatic

* 11 scales found containing the notes B, D#, F#, A, C.

Acoustic & Digital Analysis

Digital footprint of the D#dim7/B chord for MIDI programming and synthesizer sound design.

MIDI Numbers 71, 63, 66, 69, 60

Frequencies (Hz)

493.8833012561241, 311.1269837220809, 369.9944227116344, 440, 261.6255653005986