Sevenths · C# root / D♭
C#°7 / D♭°7
Maximum tension. Fully symmetric — every inversion sounds similar.
Notes in C#°7
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#°7, C#m, C#7, or another quality — the hardest and most useful ear training skill.
Diminished 7th in All 12 Keys
Other Chords in C#
Related Sevenths
About the C#°7 Chord
The C#°7 chord is a diminished 7th chord built on C# (also written D♭°7). It contains the notes Db, E, G, Bb — the root, third, fifth, and seventh.
Maximum tension. Fully symmetric — every inversion sounds similar. Practising the C#°7 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.