Eb Augmented (Ebaug)
Also written as D# Augmented (D# and Eb are the same key).
1+3+#5
Notes in Eb Augmented
D# (root)GB
Inversions
Same notes as Eb Augmented, with a different chord tone as the lowest note. Useful for smoother movement between chords instead of jumping around the keyboard.
Root position
D# in the bass
1st inversion
G in the bass (Ebaug/G)
2nd inversion
B in the bass (Ebaug/B)
Press D#, G and B together on the keyboard and you're playing Eb Augmented.
Stretch the fifth of a major chord up by a semitone and the result is symmetrical: two identical major thirds stacked on top of each other. That symmetry means the chord has no clear sense of up or down, giving it a floating, slightly dizzying quality composers reach for when a moment needs to feel suspended or unresolved.