- ii7A♭m7
- V7♯9D♭7♯9
- Imaj7G♭maj7
D♭7♯9 is the chord that wants to resolve, so ending the loop on it hands straight back to the top.
The D♭7♯9 chord is a altered dominant seventh chord built on the root note D♭. Its notes are D♭, F, A♭, C♭ and E. It's enharmonically the same chord as C♯7♯9.
Dominant seventh sharp nine chords sound gritty and bluesy at once, the clash of a major third against a sharp ninth that reads to the ear like a minor third. Funk, rock and soul horn sections lean hard on this one chord.

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.
To play D♭7♯9 on piano, place your right hand with your thumb on D♭, index finger on F, middle finger on A♭, ring finger on C♭ and little finger on E. Press the keys together and listen for an even sound. On the keyboard D♭ and A♭ are black keys and F, C♭ and E are white. C♭ is the key you'd normally call B. The thumb starts on a black key, so slide the whole hand a little further in, towards the fallboard. Practice moving in and out of the chord slowly, then bring in a metronome.

Switch to the interactive diagram to hear the chord, change voicing and swap finger numbers for note names.
On guitar, D♭7♯9 is commonly played with the voicing shown above. The fretted notes sit between frets 1 and 4. Strings 2 and 1 ring open. Don't play string 6.
D♭ · F · A♭ · C♭ · E
Try D♭7♯9 on the virtual piano
Free, in your browser: play with the mouse, your computer keyboard or a USB MIDI keyboard. No sign-up.
Also known as C♯7♯9
| Degree | Interval | Semitones | Note | Hear |
|---|---|---|---|---|
| 1 | Root | 0 | D♭(Db) | |
| 3 | Major third | 4 | F | |
| 5 | Perfect fifth | 7 | A♭(Ab) | |
| ♭7 | Minor seventh | 10 | C♭(Cb) | |
| ♯9 | Augmented ninth | 15 | E |
The D♭7♯9 chord is built from a root, a major third, a perfect fifth, a minor seventh and an augmented ninth. Start at the root D♭ and stack the intervals to get the whole chord: D♭, F, A♭, C♭ and E. The same formula gives you the chord in any other key.
Dominant seventh sharp nine chords drive funk, blues-rock and fusion as the tonic of a dominant-based vamp, not only as a V chord. Whole grooves in soul and rock guitar are built around this one chord.
D♭7♯9 holds both a major third and a raised ninth that sounds like a minor third, so it is major and minor at once. That clash separates it from D♭7♭9, where the ninth is lowered, and from D♭9, where it is natural. Guitarists often call it the Hendrix chord.
A dominant chord wants to resolve. Its home is the V of a major key - and the I of a blues, where the pull never lets up.
D♭7♯9 is the chord that wants to resolve, so ending the loop on it hands straight back to the top.
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