A fridge (compressor) in a studio I lived in often made me hear Barber's "Adagio for Strings" (sad song in the game "Homeworld" or the movie "Platoon"). I think

A fridge (compressor) in a studio I lived in often made me hear Barber's "Adagio for Strings" (sad song in the game "Homeworld" or the movie "Platoon"). I think it hummed at the frequency of the long note then slowly shifted in pitch similar to the three-note patterns that follow, or something.