Extended · C# root / D♭
C#11 / D♭11
Dense and atmospheric. The 11th adds a suspended quality over the dominant.
Notes in C#11
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#11, C#m, C#7, or another quality — the hardest and most useful ear training skill.
11th in All 12 Keys
Other Chords in C#
Related Extended
About the C#11 Chord
The C#11 chord is a 11th chord built on C# (also written D♭11). It contains the notes Db, F, Ab, B, Eb, Gb — the root, third, fifth, seventh, and extensions.
Dense and atmospheric. The 11th adds a suspended quality over the dominant. Practising the C#11 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.