Space plays and stops
- Notes and intervals
- Cm3Ebm3GbM3Bb
C Half Diminished, written Cm7b5, is built from C, Eb, Gb and Bb: the root, minor 3rd, flat 5th and minor 7th.
Its 3rd and 7th, Eb and Bb, are its guide tones: they say what kind of chord it is, so voicings are built around them and the root is often left to the bass.
In the progressions here, Cm7b5 is the iiø7 of the Minor ii-V Progression in Bb, the viø7 of the Minor i-vi-ii-V Progression in Eb, the iiiø7 of the Minor ii-V to ii-V-I Progression in Ab and the viiø7 of the Bird Blues in Db.