Chiptune musician @atarimae_400 learned that the jingles played at some Japanese railway stations sound similar to the tones generated by a certain model of pocket calculator. So @atarimae_400 performed some of the melodies on his own adding machines.

As Kraftwerk sang, "I'm the operator with my pocket calculator." Read the rest

https://boingboing.net/2020/06/29/japanese-railway-melodies-play.html