Sorry, I did not explain correctly.
I am not trying to get more than stereo per call, actually mono is fine.
What I need is multiple caller to call the plugin, typically 4, and have access to the audio coming from each caller individually.
Currently, in the JACK framework, I only have access to the audio coming from the first caller.
In the example using Reaper on your WEB site, you have 2 callers and you have 2 vu meter bar for incoming and outgoing
In my case using the plugin with jalv or carla, I always have one vu meter bar for incoming and outgoing even if I have 3 callers active.
Also I tried to start multiple plugin but it does not work, I get the following error:
Studio Link Webapp v17.03.1-beta - Effect Plugin Copyright © 2016 Sebastian Reimers <studio-link.de>
tcp: sock_bind: bind: Address already in use (af=2, 127.0.0.1:37545)