One more minor thing you may run in to: if you get everything set and the audio still seems to be mixed between the two radios and not coming from different channels, you may have to change the settings in the Windows Sound Control Panel (assuming you are using Windows). On Win 10, search for "sound" and you should get the Sound Control Panel as one of the options. Under the Recording tab, you should see the audio device you plan to use for your stream. Make sure the settings match those of your feed program: