I had two old computers that would play the first 2.5 notes of Fur Elise every time they were power cycled, before the fan was completely spun up. I only figur

I had two old computers that would play the first 2.5 notes of Fur Elise every time they were power cycled, before the fan was completely spun up. I only figured out what it was after holding the fan one day and recognising the tune.