- New FMX7 Engine - Based on DX7, you can now play polyphonically up to 6 voices, your favorite DX7 .syx patches. You can load 32-preset Banks or individual patches to the SD Card and select which ones you want to play while using Coral. And of course you can spice the patch a bit!
- New ACID 2 Engine - Now More Acid Dripping Smoothness, Filtering madness + 4 Flavors of Distortions. Devil Mode on option settings for that extra low end 😈
- New OB-VA Engine! The Curtis effect, the rich, earth shaking unison lows and crisp mids. Inspired by the legendary sound, now at your hands.
- New String 2 Machine! Inspired by string machines, a new engine in the tiny Coral pack! From Italo to Dub, fun is guaranteed! With Smart Chord (optional mode) String 2, play one note, get a full chord. Your lowest note sets the key, the encoder picks the scale (10 flavors, saved per preset), and MORPH sweeps the voicing from stark techno fifths to lush jazzy stabs. One finger, always in key.
- New Pianoz engine! Who doesn't love the old school Rompler Piano Sound? Or the SP1200 sampled Rhodes? And those crazy E-Organ sounds from your toy piano from when you were a kid? It's here now, have fun with some tricks to get those Piano Stabz like the doubler effect! Also contains Smart Chord fun!
- New Stitcher engine, a drone machine inspired and hommage to the Fieldtone pedal, with our twists. Get samples in there, and go crazy with what you can do, turning options on and off and generate awesome drones, textures, soundscapes! Hit 1 key have fun!
- DRONE MODE, enable the Drone mode for the engines in the brand new Ring Options Menu. You can now enable drone mode for the engines, up to the voice limit. Some combinations get hot and glitchy, now it's your turn to discover them!
[...]
Hold the BOOT button and plug a USB cable into the Coral's micro USB port to enter firmware update mode. Open a Chrome or Opera browser and go to the OXI Coral web updater at oxiinstruments.com/updater-coral. Select "DFU in FS Mode" from the device list, choose the firmware version from the dropdown, and click Program.
What you need
OXI Coral web updater — the software OXI Instruments uses to load firmware onto the OXI Instruments Coral. Download links below.
10 releases since Jun 2023, roughly one every 4 months.
Changelogs summarised from the manufacturer's release notes.
Version 3.0 — 30 Sep 2026
Release notes for this version are listed above.
Release notesopens in a new tab — oxiinstruments.com
Version 2.5 — 24 Feb 2025
New DRUMS 2 firmware:
- Increase preset slots up to 100, 10 groups of 10. (add "extpre 1" to your options.txt file)
- Reset pitch bend and update default preset
- Dual wavetable oscillator. 2 oscillators per voice with detune control and independent table positions per oscillator.
- Fix startup issues with some SD cards.
- Acid engine 2.0 with glides and accents and overall improved sound.
- Stereo Delay effect with ping-pong, LP filter and clocked timing that can be fully controlled via MIDI CC. When enabled, "noise" parameter is overridden by the Delay send amount.
- New features can be enabled through the options.txt file like:
- VU meter
- Encoder part selection priority
- New alternative firmware that includes the new 3 VCO Moog-Style engine
- Detuning controls are more finely calibrated to easily align with musical intervals, such as +7 and +12 semitones. This applies to VA, FM and the new 3 VCO engines.
- Resolved a problem related to the 'Knobs-catching up' feature that occurred when switching between different parts.
- Adjust how Poly Aftertouch affects Filter Cutoff and Amp Level
- Pitch Bend ( PB ) range can be adjusted in the **options.txt** file adding the following line: `pbrang 24`
- The pitch bend range can go from 1 to 48
- Fix running status issues with Note On-0 velocity as Note Off messages
- Add MPE support.
- To enable MPE you need to add the following line to the "options.txt" file: mpeena 1
- MPE will automatically enabled if Coral receives the appropriate MPE Zone configuration messages.
- New ACID engine available in alternative firmware. A variable-shape virtual analog oscillator that seamlessly morphs from the classics Saw to Square waveforms with dynamic PWM capabilities. Post-filter distortion with edgy filter and finely tuned parameters.
- Harm controls the overdrive distortion
- Timbre defines the oscillator waveform
- Morph adds wavefolder distortion
- Controlling both distortions separately provides a wider sonic palette.
- fix in overlapping MIDI note OFF/ON messages not retriggering the envelopes.
New alternative firmware with new engine (see below in download section)
- Adjustments in additive engine
What is the latest firmware for the OXI Instruments Coral?
The latest firmware for the OXI Instruments Coral is version 3.0, released on 30 Sep 2026. FW//RADAR last checked OXI Instruments's official page on 27 Oct 2026.
How do I update the OXI Instruments Coral?
Hold the BOOT button and plug a USB cable into the Coral's micro USB port to enter firmware update mode. Open a Chrome or Opera browser and go to the OXI Coral web updater at oxiinstruments.com/updater-coral. Full instructions on OXI Instruments's official firmware page.
What software do I need to update the OXI Instruments Coral?
You need OXI Coral web updater, available from oxiinstruments.com.
Where can I download OXI Instruments Coral firmware and drivers?
Directly from OXI Instruments's official firmware page — FW//RADAR links to the source and never hosts firmware files. Official firmware page →
Where can I find the OXI Instruments Coral manual?