Here’s something pretty neat. A man by the name of Linus Åkesson has turned an old organ into an 8-bit synth.
All the original tone-generating parts have been disconnected, and the keys, pedals, knobs and switches rerouted to a microcontroller which transforms them into MIDI signals. Those are then parsed by a second microcontroller, which acts as a synthesizer.
He kind of explains how he made it, so if you’re technically inclined, you could try and make one. If you succeed, then it’s time join the likes of Deadmau5 and Bassnectar and enjoy that sweet 8-bit sound.