[LAD] build problem with ambix plugins + LV2

Matthias Kronlachner m.kronlachner at gmail.com
Tue Oct 14 21:06:34 UTC 2014

On 14/10/14 11:06, Filipe Coelho wrote:
> On 10/13/2014 09:41 PM, Matthias Kronlachner wrote:
>> On 13/10/14 21:34, Filipe Coelho wrote:
>>> Filipe here (Juce-LV2 wrapper author).
>>> What exactly is the problem with the LV2 UI?
>>> Which hosts have you tested it with?
>>> Does the VST UI work?
>>> Are you using the latest juce-lv2 code as available here?
>>> https://github.com/DISTRHO/DISTRHO-Ports/tree/master/libs/juce/source/modules/juce_audio_plugin_client/LV2
>>> If you give me a link to the source I'll have a look at it.
>> Hi Filipe,
>> thanks for the reply! I am using the latest version of your wrapper, 
>> just got it today from your repo.
>> You find the plug-ins here: https://github.com/kronihias/ambix
>> Some VST-UIs work, but not all.
>> Eg. the decoder vst GUI works, but the LV2 version does only show an 
>> empty window.
>> The encoder GUI crashes, might be OpenGL related.
>> I tested it with Ardour-3.5.403.
> Well after building the LV2 code the issue is clear - you do not have 
> proper URIs for the plugins.
> LV2 uses URIs to identify plugins, see 
> http://en.wikipedia.org/wiki/Uniform_resource_identifier
> Making the LV2 URI a single plugin name is very wrong and against the 
> spec.
> If you don't have a domain you can use "urn:ambix:PLUGIN".
> The URI doesn't have to exist on the internet, it's only used locally 
> to identify the plugin.
> After setting a proper LV2 URI the UI appears and works as usual [1].
> In short, just change the broken JucePlugin_LV2URI macro in your 
> AppConfig.h files for a real URI and it should work.
> [1] - http://i.imgur.com/FSqaxn0.png

Thanks Filipe, the UIs do work now.

One things is strange though, if you open the UI and close it several 
times the GUI moves out of the window.
There seems to be something wrong with the window borders.
Any idea?

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