Space plays and stops
- Notes and intervals
- D#M3F##M3A##2C#
- Extends
- D# Dominant 7
D# Augmented 7, written D#7#5, is built from D#, F##, A## and C#: the root, major 3rd, sharp 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. A7, a tritone away, has the same two notes the other way up, so it can stand in for D#7#5 as its tritone substitute.