D# Suspended 2nd (D#sus2)
Also written as Eb Suspended 2nd (Eb and D# are the same key).
1+2+5
Notes in D# Suspended 2nd
D# (root)E#A#
Inversions
Same notes as D# Suspended 2nd, 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
E# in the bass
2nd inversion
A# in the bass
Play D#, E# and A# together and you get D# Suspended 2nd.
Suspended chords pull the third out entirely, so they land somewhere between major and minor rather than picking a side. Sus2 fills the gap with a major second sitting close to the root, which gives it an open, slightly hollow color. It's a favorite way to add movement to a strummed or arpeggiated part without changing the underlying harmony.