Log in to the Groove Synthesis support page (free account), open the 8M Desktop tab, download the latest firmware ZIP and unzip it to get the .ldr file.
1. Connect the 3rd Wave 8M to your computer with USB; it appears as an external drive.
2. Copy the .ldr file into the firmware folder on that drive.
3. On the 8M press GLOBAL, use Soft Knob 1 to select "Firmware Update", then Soft Knob 2 to select go.
4. Eject the drive on the computer and disconnect the USB cable.
5. Press Soft Button 6 (ok) and wait until the display says the update is finished.
6. Power the unit off and on again; the new OS version shows in the upper right corner of the display.
Groove Synthesis 3rd Wave 8M firmware update history
4 releases since Dec 2025, roughly one every 3 months.
Changelogs summarised from the manufacturer's release notes.
Version 2.0d — 13 Oct 2026
Release notes for this version are listed above.
Release notesopens in a new tab — groovesynthesis.com
Version 2.0c — 10 Sep 2026
Enhanced MIDI SysEx implementation functionality for upcoming editor/librarian tools, distributed to early adopter beta testers.
Release notesopens in a new tab — groovesynthesis.com
Version 2.0a — 23 Aug 2026
new in verison 2.0a:
- New Shimmer Reverb added to the list of effects for Effect 2
* - The new shimmer reverb is quite heavy on the Third Wave's CPU. For the 24-voice models, while effects are allowed across all four parts, parts 1 and 3 share one effect core, and parts 2 and 4 share another. Consequently, you can only use the shimmer reverb on one part per pair. For example, if shimmer is active on part 1, it cannot be used on part 3.
* - Additionally, you cannot run any other reverb or heavy effect (such as the Echoplex or Leslie speaker) on a core that is currently running the shimmer effect. If you attempt to do so, a message will appear in the effects window indicating that your effect options are limited to a smaller, available selection. The 8M is not affected by this limit due to the fact that it only has two parts.
- Improved Make Waves functionality - automatic wavetable maker has been noticeably improved, including the addition of a new spectral mode that analyzes the audio from start to end in the frequency domain
- Expanded MIDI CC mappings for 24voice module and 8M. See MIDI implementation spec for more info
- New MIDI SysEx functionality for importing and exporting wavetables.
- New MIDI SysEx functionality for importing and exporting multisamples
- New option for Envelope Retrigger Mode in MISC settings, “reset from 0 (fast click)”, which will reset envelopes to 0 with smoothing disabled, so it will reset quickly and might have an audible click
- New GLOBAL option “MIDI include part in nrpn”, when set on the 3rd Wave will add an offset for each part so that per part settings have unique nrpns instead of relying on nrpn 0. See MIDI implementation spec for more info
- Various bug fixes for controlling synth via MIDI nrpn
- Bug fix for mono and free running LFO modes to ensure they are resynchronized appropriately when switched back and forth.
[...]
Version 1.9c — 24 Dec 2025
Tracked in 1 rig on FW//RADAR.
Groove Synthesis 3rd Wave 8M firmware FAQ
What is the latest firmware for the Groove Synthesis 3rd Wave 8M?
The latest firmware for the Groove Synthesis 3rd Wave 8M is version 2.0d, released on 13 Oct 2026. FW//RADAR last checked Groove Synthesis's official page on 26 Oct 2026.
How do I update the Groove Synthesis 3rd Wave 8M?
Log in to the Groove Synthesis support page (free account), open the 8M Desktop tab, download the latest firmware ZIP and unzip it to get the .ldr file. 1. Full instructions on Groove Synthesis's official firmware page.
Where can I download Groove Synthesis 3rd Wave 8M firmware and drivers?
Directly from Groove Synthesis's official firmware page — FW//RADAR links to the source and never hosts firmware files. Official firmware page →
Where can I find the Groove Synthesis 3rd Wave 8M manual?