Older motherboards only had a buzzer which could play a tone at a given frequency. Mostly they just beeped but you could use them to play a crude song, if you w

Older motherboards only had a buzzer which could play a tone at a given frequency. Mostly they just beeped but you could use them to play a crude song, if you were so inclined. In high school I wrote a VBA macro for Word which would do this - good times! I’d guess someone was having fun and left in the wrong code. Usually the manual would explain the buzzer meanings, e.g 4 beeps is overheat, 3 is bad memory, etc. Nowadays there’s a proper speaker and an audible message.