D# add11/F#
The D# add11 chord consists of the D# (Perfect unison), G (Major third), A# (Perfect fifth) and G# (Perfect eleventh) notes, with F# as the bass note.

How to play the D# add11/F# chord
- Play F# as the lowest bass note in the left hand
- Find D# (Root) on the piano keyboard
- Add G (Major third) — 4 semitones above D#
- Add A# (Perfect fifth) — 7 semitones above D#
- Add G# (Perfect eleventh) — 17 semitones above D#
- Press all 5 notes simultaneously to sound the D# add11/F# chord