Acoustic Bridge

I picked up Acoustic Bridge as I already use Multiplicity and this would hopefully allow me to pipe audio to my headphones from other computers as I work (allowing me to keep my programming PC doing programming and streaming video to my gaming machine for display while using my programming PC headphones).

The software installed, but on both Windows 10 PCs there is no tray icon (which seems to be mentioned by others). Minimizing just minimizes to the taskbar and closing the window seems to close it.

I'm curious about this, because I don't get any error messages when I set things up with real machines names (if I fake them, I get "cannot connect" messages as expected) but there doesn't seem to be any audio playing from the receiving Acoustic Bridge app. In fact, the mixer doesn't even show it as an application that can be adjusted in volume.

Is there something extra on Windows 10 that is required to get this fired up?