Ab add2
The Ab add2 chord consists of the Ab (Perfect unison), Bb (Major second), C (Major third) and Eb (Perfect fifth) notes.

How to play the Ab add2 chord
- Find Ab (Root) on the piano keyboard
- Add Bb (Major second) — 2 semitones above Ab
- Add C (Major third) — 4 semitones above Ab
- Add Eb (Perfect fifth) — 7 semitones above Ab
- Press all 4 notes simultaneously to sound the Ab add2 chord