Finger Positions

D#9b5/A# diagram
Root Note D#
Name D# over A#
Intervals 1P-3M-5d-7m-9M
Relative Minor Cm
Notes A#, D#, G, A, C#, F
Aliases D#9b5

How to play the D#9b5/A# Chord

The D#9b5/A# 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# over A# is built using the 1P, 3M, 5d, 7m, 9M intervals. In the key of D# Major, this chord functions as the I chord.

Common Progressions

In music composition, the D#9b5/A# 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
Prometheus Whole Tone Locrian Major Lydian Dominant Leading Whole Tone Lydian Minor Messiaen's Mode #6 Composite Blues Messiaen's Mode #3 Chromatic

* 10 scales found containing the notes A#, D#, G, A, C#, F.

Acoustic & Digital Analysis

Digital footprint of the D#9b5/A# chord for MIDI programming and synthesizer sound design.

MIDI Numbers 70, 63, 67, 69, 61, 65
Frequencies (Hz)

466.1637615180899, 311.1269837220809, 391.99543598174927, 440, 277.1826309768721, 349.2282314330039