E addb9
The E addb9 chord consists of the E (Perfect unison), G# (Major third), B (Perfect fifth) and F (Minor ninth) notes.

How to play the E addb9 chord
- Find E (Root) on the piano keyboard
- Add G# (Major third) — 4 semitones above E
- Add B (Perfect fifth) — 7 semitones above E
- Add F (Minor ninth) — 13 semitones above E
- Press all 4 notes simultaneously to sound the E addb9 chord