The accordion is probably the most nerdy instrument on the planet, until someone could use an applicable digeridoo with a guitar-original controller. So, for now, the crown surely goes to Linus Akesson, a Swedish musician and electronics engineer. He’s combining his passions for music and vintage electronics for years. But his latest project is surely his masterpiece. The Commodordion is a working accordion made up of two computers of Commodore 64.

The instruments hardware is two authentic C64s from the 1980s, whose origin is a bellow (the foldy part of the middle) made of dozens of floppy disks together. The Commodore 64s is fully functional as a standard accordion. The right hand plays melody on the computer keyboard and the right hand plays chords on the computer keyboard. A 7-bit symphony was first discovered by Ars Technica.

The bellows on a standard accordion emit the sound across steel reeds, and the speed at which the player compresses or expands the instrument controls the volume. Akessons invention emulates this action digitally: a microphone measures the air being expelled by the bellows and adjusts the volume of the sound output to match. The entire pity is powered by an internal battery (with both PCs and Akesson’s) and runs on every PC.

What do you think to play with two computers but it doesn’t want to replicate regular music? In addition to playing the Commodordion logically, Akesson can also program custom beats and loops on the left half of the machine, making it a lot simpler to use than to play a rhythm box or MIDI keyboard.

To show off his musical skills and ingenuity, programming, and hardware-requirements, Akesson cut his demo as a love letter to Scott Joplin and The Sting (1973). This video is worth watching to see how he works and designing the machine, and programming it and of course the game. Find more technical details on the build on the website of Akessons.