May be an experimented forum member can help me.
In Reaper, when I insert multiple Studio Link VST, each in their own respective tracks, I can only see one GUI in Chrome Browser. How is it possible to display them ? What are their port ? 127.0.0.1:XXXX ?
You control all tracks within one Browser. If you add new tracks with plug-in and add a route (reaper routing matrix) you should see multiple „Your signal“ levels. Each call is mapped automatically (first free track).
In addition: if you want to call multiple people, you should first add the correct amount of tracks+Studiolink-VST before calling them. Otherwise, you will not receive the call, afaik.