Cø7
Sevenths · C root
Cø7
Also called min7♭5. The ii° in minor key ii-V-I progressions.
0 st3 st6 st10 st
Notes in Cø7
CRoot
D#3rd
F#5th
A#7th
C is the natural starting point — no sharps or flats. The clearest key to hear chord quality in isolation.
Identify the Chord Quality on C
Each chord below is played on C. Listen and identify whether you heard Cø7, Cm, C7, or another quality — the hardest and most useful ear training skill.
Half Diminished in All 12 Keys
Other Chords in C
Related Sevenths
About the Cø7 Chord
The Cø7 chord is a half diminished chord built on C. It contains the notes C, D#, F#, A# — the root, third, fifth, and seventh.
Also called min7♭5. The ii° in minor key ii-V-I progressions. Practising the Cø7 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.