Added · C# root / D♭
C#add9 / D♭add9
A major triad with an added 9th but no 7th. Bright and open.
Notes in C#add9
C# / Db sits between C and D. A common key in jazz and pop — think Db major in many jazz standards.
Identify the Chord Quality on C#
Each chord below is played on C#. Listen and identify whether you heard C#add9, C#m, C#7, or another quality — the hardest and most useful ear training skill.
Add 9 in All 12 Keys
Other Chords in C#
Related Added
About the C#add9 Chord
The C#add9 chord is a add 9 chord built on C# (also written D♭add9). It contains the notes Db, F, Ab, Eb — the root, third, fifth, and seventh.
A major triad with an added 9th but no 7th. Bright and open. Practising the C#add9 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.