Extended · D# root / E♭
D#9 / E♭9
A dominant 7th with an added 9th. Funky and full of energy.
Notes in D#9
D# / Eb is the key of choice for many jazz standards and brass-heavy arrangements.
Identify the Chord Quality on D#
Each chord below is played on D#. Listen and identify whether you heard D#9, D#m, D#7, or another quality — the hardest and most useful ear training skill.
Dominant 9th in All 12 Keys
Other Chords in D#
Related Extended
About the D#9 Chord
The D#9 chord is a dominant 9th chord built on D# (also written E♭9). It contains the notes Eb, G, Bb, Db, F — the root, third, fifth, seventh, and extensions.
A dominant 7th with an added 9th. Funky and full of energy. Practising the D#9 chord across different voicings and contexts builds the harmonic recognition that lets you identify it instantly in any musical setting — whether in a band mix, a recording, or a live performance.