In LV2 (zynthian), implement loading of IR files using the LV2 Path extension.

[jofemodo]

LV2 plugins (and zynthian!) does support loading files. There is no limitation.
You should be capable to tell JUCE to export the "IR file" parameter & generate TTL for it. JUCE should support the Path extension, that is part of the LV2 core specs from long time ago. If this is not possible with JUCE, the limitation is not in LV2/Zynthian, but in JUCE not supporting the LV2 mechanism to load files, that is pretty straightforward.

The TTL generated by JUCE for the "IR file" paraemter should be something like this:

<plug:_20_irfile>
	a lv2:Parameter;
	mod:fileTypes "wav,flac";
	rdfs:label "IR File";
	rdfs:range atom:Path.

Regards,

[jlearman]

Thanks -- but how would the user specify the filename in Zynthian, since there's no UI?

[jlearman]

BTW, the limitation isn't LV2, it's just that the UI doesn't appear on Zynthian. Or, if there's a way to get it to appear, I just don't know how, on Zynthian.