Gb sus2/Dbb
The Gb sus2 chord consists of the Gb (Perfect unison), Ab (Major second) and Db (Perfect fifth) notes, with Dbb as the bass note.

How to play the Gb sus2/Dbb chord
- Play Dbb as the lowest bass note in the left hand
- Find Gb (Root) on the piano keyboard
- Add Ab (Major second) — 2 semitones above Gb
- Add Db (Perfect fifth) — 7 semitones above Gb
- Press all 4 notes simultaneously to sound the Gb sus2/Dbb chord