In his latest video, MrCaliforniaD introduces a unique creation—a Commodore 64 synth made from the carcass of a dead C64 and an Arturia MiniBrute keybed. Unlike MIDI controllers or microcontroller-based designs, this build uses carbon contacts that interface directly with the C64’s original keyboard matrix. The result? A playable synth that works seamlessly with all music software that maps sounds to keys on the Commodore 64.
This project isn’t just a tribute to retro aesthetics. It’s functional, clever, and fully integrated with vintage music programs—whether common or obscure. MrCaliforniaD demonstrates the synth in action by playing a simple melody, giving viewers a real sense of how responsive and flexible this modded machine can be.
Keyboard Construction and Compatibility
The hardware sits on top of the Commodore 64, making physical contact with the keys inside the case. This method maintains full compatibility with existing software, meaning no firmware or configuration headaches—just plug, press, and play. If a program lets you play music using the C64 keyboard, this synth can control it. That broad software support makes this device unusually versatile.
Even though this video focuses on performance, it’s only part one of a two-part series. In the follow-up, MrCaliforniaD promises a full breakdown of how the Commodore 64 synth was built—perfect for hardware hackers curious about replicating it.
Why Watch
This video blends creativity and practical electronics into a musical project that bridges eras of technology. Anyone into retro computing, DIY instrument building, or chip music will appreciate what’s shown here—and likely be back for part two.
