When I press C2 on my piano, I hear E4 and G4. When I press B3, D4, F4 and A♭4, I hear G2. I don't know why this is. It's like the soundwaves lead somehow to the major-quintachord C-E-G and to the little-dominant nonachord G-B-D-F-A♭. How is this possible? I'm not pressing E4 or G4 or G2, but they make the sound.
Why do I hear this? How is this possible? I have the perfect pitch so it's possible that I maybe hear what others don't, but how can I hear full chords from pressing a few keys?