Just a follow up. The creator of Trueno responded kindly, but here’s the main part:
So Linux support would be quite difficult with the current design. A fair amount of processing is done in the VST (the tuning, LFOs/ENVs, wavetable generation etc), this is then summed up and sent as “Control Voltage” type signals to the synth which then sends audio back.
The idea behind this is it would be easy to add features later (ie: fancier LFOs, arps, step sequencers etc). However, this makes it quite a lot harder to port to other platforms. If I sell enough to justify designing a Trueno 2.0 then I’d like to put most of the processing on the stick which would allow easier porting (quite a few people have asked for iOS compatibility). At that point I’d be happy to release an API to allow someone to write their own editor.
Personally I wish Linux played a much bigger role in the professional audio scene - but I guess by not supporting it I’m not really helping matters!