A developer working as tracelistener has published aira-switcher, a browser-based tool that lets owners of Roland's Aira eurorack effects modules run any of the four firmware personalities on any of the units. Synthtopia covered the project on 1 September 2026.

How it works

Roland sold four Aira modular effects: Bitrazer, Demora, Torcido and Scooper. tracelistener says the firmware for the four differs by a single byte, which is what makes the swap possible, and that they worked out how to pull a backup off their own Scooper with the help of AI.

The tool runs in the browser and processes files locally, with nothing uploaded. The owner connects the module over USB, extracts the AIRA_MODULAR_ROM.BIN and ROMINFO.TXT files from it, picks the model they want, and the tool generates the files to restore to the hardware.

What the project says about risk

The README says restoring rewrites boot code and saved settings, and that a power failure during the process can require hardware repair. It tells users to keep their own backups and not to upload firmware or personal data to the repository.

Two firmware builds are listed as verified: v1.05 build 0493 on Scooper and v1.05 build 0491 on the other units. The README says other units are not independently verified. Synthtopia added that it had not been able to test the tool.

The project describes itself as unofficial and not affiliated with Roland, and no source code license has been chosen for it.

Via Synthtopia. The code is on GitHub.