USBSID-Pico Connects Two Real Commodore 64 Sound Chips to Modern Computers Through USB and MIDI

LouD's open-source USBSID-Pico project interfaces two genuine MOS 6581/8580 SID chips with contemporary computers via Raspberry Pi Pico, USB, and MIDI connections.

One of the most distinctive sounds in computer gaming history is receiving another modern hardware companion. The USBSID-Pico project, developed by LouD, has attracted fresh attention through Hackaday's 2026 Retrocomputing Challenge. An October 13 feature highlights a device that connects two genuine MOS SID sound chips, or compatible hardware replacements, to contemporary computers using a Raspberry Pi Pico microcontroller. The SID was the legendary sound generator inside the Commodore 64, responsible for some of the most recognisable music in 1980s computer gaming. Its distinctive filters, waveforms and analogue characteristics helped composers produce remarkably sophisticated music from limited hardware. USBSID-Pico provides several methods for communicating with physical SID chips, including USB CDC, WebUSB, WebSerial, MIDI and ASID. The latter is particularly interesting because it allows software to transmit SID register information through MIDI connections, making physical chips accessible to modern music production environments. The project supports two SID devices, opening possibilities for expanded stereo arrangements and more elaborate compositions. It also demonstrates how modern microcontrollers can act as bridges between contemporary software and historical electronic components. Although SID emulation has improved enormously, some musicians continue preferring original hardware because of differences in analogue behaviour and individual chip characteristics. The project has also achieved open-source hardware certification, allowing enthusiasts to study its design and potentially construct compatible devices themselves. USBSID-Pico is relevant to gaming preservation because music is an essential part of the Commodore 64 experience. Preserving software without understanding its original sound hardware risks losing part of what made those games memorable. Forty-four years after the C64 launched, developers are still finding new ways to make its sound chips sing. The original composers would probably be delighted, although they might ask why modern computers need so many cables to reproduce three voices.