OXI Instruments has released Coral 3.0, a firmware update for the Coral 8-voice polyphonic Eurorack voice that adds six new sound engines and a build-your-own firmware workflow.
The new firmware brings the engine count from 21 to 27, with the additions being FMX7 (a DX7-style FM engine), ACID 2, OB-VA, String 2, PianoZ and Stitcher. Rather than loading every engine at once, you now choose the ten you want and compile a custom firmware for your module in the browser, then upload it. A new Drone mode and Engine Memory round out the change, alongside a batch of quality-of-life fixes.
Source: OXI Instruments, October 2026
Free firmware update for existing Coral modules.