Factorio Conveyor Belt Music Box

Playing a random MIDI arrange of Misirlou by Dick Dale (it happened to match the tempo of express conveyor belts and was the first idea that popped to mind). When I found out that conveyor belts emit pulses when items enter them, and that there were programmable speakers, I knew I had to do this. Some info about how this works and how it was made: Each speaker plays one pitch of one instrument; not very clever, but it’s simple and allows different pitches and different instruments to play simultaneously.