Audio / MediaTrack / Stream Volume

When I try to connect two devices together, I experience that streams’ volumes are too quiet, and I cannot find any way to fix it. Volumes are comparable to a normal phone call, but I do not want to talk with someone holding phone by my ear especially when there are video cameras involved. So what are the possibilities ? , I have idea that maybe there should be implemented something like GainNode that would amplify participants’ voices, but I have no idea how it should be done with this library.