Space plays and stops
- Notes and intervals
- E#M3G##M3B##2D#
- Extends
- E# Dominant 7
E# Augmented 7, written E#7#5, is built from E#, G##, B## and D#: the root, major 3rd, sharp 5th and minor 7th.
Its 3rd and 7th, G## and D#, 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. B7, a tritone away, has the same two notes the other way up, so it can stand in for E#7#5 as its tritone substitute.