E Viennese trichord
The E Viennese trichord chord consists of the E (Perfect unison), F (Minor second) and A# (Diminished fifth) notes.

How to play the E Viennese trichord chord
- Find E (Root) on the piano keyboard
- Add F (Minor second) — 1 semitone above E
- Add A# (Diminished fifth) — 6 semitones above E
- Press all 3 notes simultaneously to sound the E Viennese trichord chord