
Piano Chord Encyclopedia
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C Half-Diminished 7th Chord

The C half-diminished seventh chord (Cm7♭5): This chord is made up of the notes C, E-flat, G-flat, and B-flat. It consists of a diminished triad (C-E-flat-G-flat) with the addition of a minor seventh (B-flat). The C half-diminished seventh chord has a tense and unstable sound, and is often used to create dissonance and tension.
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