D# sus4
The D# sus4 chord consists of the D# (Perfect unison), G# (Perfect fourth) and A# (Perfect fifth) notes.

How to play the D# sus4 chord
- Find D# (Root) on the piano keyboard
- Add G# (Perfect fourth) — 5 semitones above D#
- Add A# (Perfect fifth) — 7 semitones above D#
- Press all 3 notes simultaneously to sound the D# sus4 chord