System volume works as normal, can change volume and mute, but internal makes no changes. Disabled just disables the slider and says 'NA' in the tooltip, which I assume is correct.
The only reason I assumed it was a J River issue is because I tried it on a different system (different soundcard, motherboard, everything) and I still can't change volume.
I've tried all output modes including asio, internal volume makes no changes - I mean the software allows changes, even the ouput says "Adjust volume by x db for internal volume", but the change does not occur, not even mute.
I'm just playing music, mp3 and flac.