Space plays and stops
- Notes and intervals
- D#m3F#m3AM3C#
D# Half Diminished, written D#m7b5, is built from D#, F#, A and C#: the root, minor 3rd, flat 5th and minor 7th.
Its 3rd and 7th, F# and C#, 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, D#m7b5 is the viø7 of the Minor i-vi-ii-V Progression in F#, the iiiø7 of the Minor ii-V to ii-V-I Progression in B and the viiø7 of the Bird Blues in E.