UB-Xa Editor for Mac and PC

May 19, 2026

Update - UB-Xa VX
Just a cosmetic update with a better layout that fits on 2 screens. Everything needed to edit a patch is now on the first screen. The second is for Atrophy and Globals. Enjoy!

Mac versions were built on an iMac running Catalina. Plugins tested with Live 10, Logic 10.6 and Cubase LE 10.5. The plugins were compiled using Reaper. Users report that the standalone app works on later M1 Macs but the plugins do not.
I will try and test this update on an M2 if I can get access to one. Some Silicon users have left some useful comments:
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PC version is standalone only and has been tested on Windows 10 and 11. But Windows 11 now supports Mutli Client Midi you can run the editor and still use the same MIDI ports in your sequencer without conflicts. This is a game changer for Windows and MIDI.
Downloads
All files have been scanned with AVG Antivirus. The editor is free and comes with no warranties. Play at your own risk. You will need to grant access in Security and Privacy on the Mac as I am unknown developer.

Standalone Versions - if you are running these alongside your sequencer or DAW do note leave the MIDI track that is sending to the UB-Xa in record mode or armed while using the editor. This will confuse the synth as the UB-Xa will send SysEx info to the editor and to the sequencer. So this is the rule: when using the editor turn off record for that track in your sequence.
UB-Xa PC Standalone
UB-Xa VX Mac Standalone

Plugins - thses have been tested on Catalina but I don't think they will run on Silicon.

UB-Xa VX Mac VST

UB-Xa VX Mac AU

MAIN PAGE

ATROPHY EDITOR

Quick demo of saving and loading a bank

Atrophy update

Redesigned the Atrophy Profile area. Remember always turn Edit Adv to ON or your changes will have no effect and not be stored. You can now save the name of the Atrophy stored in the Patch preset. It's only 6 letters - remember to press WRITE on the UB-Xa to save it.

I discovered the Atrophy Recall was a bit flaky so the Atrophy settings now load with the patch even if they are not stored in the patch. This keeps Atrophy settings in sync with every patch. As I was sorting this out I thought it would be fun to add an Atrophy Macro Controller. All this does is let you edit a section or even all the parameters at once. The results are unpredictable so you can only use it when the Atrophy save location is set to Patch - that way you can't completely screw up your atrophy profile.

I also added additional file functions so you can now save and load Current Program. This lets you load UB-Xa patches from commercial developers like Ultimate Patches

The final update is the Side Panel. These can be saved with the patch so when you load a Current Program the Side Panel will update too. Great for accessing the hidden features of the Performance LFO like tempo lock and key trig.

Reduced SysEx data requests to just patch changes rather than whole bank transfers
Fast transfer of all 512 patch names using Get Patch Names button
Load/Save Patches, Current, Split-Double and Banks - refresh patch names to update patch list
Load and Save Atrophy Profiles
Expanded the number of Global parameters to include Pedals
Expanded Portamento control section
Upper and Lower Bank Patch lists
Easy to set Upper and Lower voices
Correctly scaled values for on screen rotary controls
More Shift functions are available - including ARP Swing that does nothing...yet?
There are a couple of new ARP controls but they do not work and are disabled
Link to the online manual (on this blog)
Matrix editor view has new look
Toned down colour scheme with more grey and less blue and red
Tested on Mac Catalina and Windows 10
Picked up and fixed a few more bugs

Please read the comments section at the bottom of the page for latest information

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Get some of my UB-Xa patches here:

Preset Patch

Example of storing Pan in a Preset - Pan is an Atrophy setting. This example uses 4 patches Jump Right. Jump Left, Jump 1-8 Left + 9-16 Right then Alternate LR.