There’s this supercapacitor with an accordion-like design, and then the Commodordion, a functional accordion built from two Commodore 64 computers by Swedish engineer Linus Åkesson. The project began by creating the bellows, with each fold requiring three floppies cut in two different patterns and kept together with tape.
Since there are 16 folds, which means that many 5.25″ floppy disk drives had to be repurposed. A custom power supply also had to be sourced so the two C64 machines are able to turn on and load custom music software written on a Commodore Datasette emulator board into each machine. The audio signals are combined using a custom mixer circuit board, which also measures input from the bellows to control the volume level of the sound output. All of the sound you hear is outputted audio through a jack since the Commodordion does not have speakers.
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The Commodordion has one huge flaw: It puts a lot of strain on the left wrist, arm, and shoulder. Most keys on the left-hand side are hard to reach, so the wrist ends up in a fully bent position, and at the same time the arm needs to carry a lot of weight while working the bellows. As a musician I take ergonomics seriously (and so should you!), so unfortunately I won’t be playing this instrument very often,” said Linus Åkesson.
