D# Augmented (D#aug)
Also written as Eb Augmented (Eb and D# are the same key).
1+3+#5
Notes in D# Augmented
D# (root)GB
Inversions
Same notes as D# 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
2nd inversion
B in the bass
D# Augmented is built from D#, G and B.
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.