Extended · C# root / D♭
C#13 / D♭13
The fullest dominant extension. Contains almost every scale degree.
Notes in C#13
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#13, C#m, C#7, or another quality — the hardest and most useful ear training skill.
13th in All 12 Keys
Other Chords in C#
Related Extended
About the C#13 Chord
The C#13 chord is a 13th chord built on C# (also written D♭13). It contains the notes Db, F, Ab, B, Eb, Gb, Bb — the root, third, fifth, seventh, and extensions.
The fullest dominant extension. Contains almost every scale degree. Practising the C#13 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.