LinuxMusicians

https://www.guitarcenter.com/IK-Multime ... OxEALw_wcB

same price at many online shops. This has a nice arpeggiator and latch mode, so a 61 or 88-key midi controller can really put the sounds thru their paces. It's also great to put in your suitcase for jam nights a beach trip

Some good news, IK's UNO software editor is mostly working in a fully updated
AVLinux with winestaging 6.22. All the sound-shaping controls work, but
preset management is not working from the editor (works from the hardware)
and the arpeggiator at times seems to miss the users octave choices.

To be fair, the editors control panel has a huge range of selections.
The linux jackd and alsa midi ports are present for selection, as are the
mAudio pci hardware ports, and in qjackctl, the UNO hardware is listed as expected.
But between the two interfaces, I admit to staring like a deer in the headlights

I have it set up so I can arpeggiate Hive and typical linux synths from the UNO flat-panel keys,
and also play the UNO sounds from my Alesis QS8 synth keyboard, while modding in both
the editor, and the UNO's knobs.

Looks like it's $129 new everywhere, so maybe a lightly used one can be had cheaper.
Cheers