Hi! I notice that all my LV2 plugins do not show automatable parameters in Reaper, on both macOS and Windows.
Here is VST3 (AU is similar), which shows all parameters as it should:
Here is LV2, which only shows three parameters, which belong to the host:
The problem does not show up on Ardour/Waveform. So it seems to be specific to Reaper.
Is it a known issue? I only find the following post related: Loading...
LV2 has two different approaches for audio parameters. The standard one (control ports) only allows the host to set parameters on the processor. There’s no way for the processor to report a parameter change to the host except via the UI. JUCE uses patch-based parameters instead, since these allow the audio processor to report outgoing parameter changes, which is more similar to the JUCE parameter model. Unfortunately, REAPER doesn’t support this mechanism (yet?).
Got it. That’s a strong reason, as some plugins definitely need to update parameters from the processor.
And yes, Reaper still does not support this feature. I will open a FR on Reaper forum to see if I can get any feedback.
