Finger Positions

Root Note D

Name D dominant flat ninth over A

Intervals 1P-3M-5P-7m-9m

Relative Minor Bm

Notes D, F#, A, C, Eb

Aliases D7b9

How to play the D7b9/A Chord

The D7b9/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 dominant flat ninth over A is built using the 1P, 3M, 5P, 7m, 9m intervals. In the key of D Major, this chord functions as the I chord.

Common Progressions

In music composition, the D7b9/A chord is often used to create tension or resolution.

I-V-vi-IV

D → A → Bm → G

vi-IV-I-V

Bm → G → D → A

The Diatonic Family

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

Triads

D Em F#m G A Bm C#dim

7ths

Dmaj7 Em7 F#m7 Gmaj7 A7 Bm7 C#m7b5

Scale Compatibility

View All Scales

Phrygian Dominant Flamenco Spanish Heptatonic Half-Whole Diminished Chromatic

* 5 scales found containing the notes D, F#, A, C, Eb.

Acoustic & Digital Analysis

Digital footprint of the D7b9/A chord for MIDI programming and synthesizer sound design.

MIDI Numbers 62, 66, 69, 60, 63

Frequencies (Hz)

293.6647679174076, 369.9944227116344, 440, 261.6255653005986, 311.1269837220809