Originally Posted by: randypurcell 
I do not now if it is a) Zoom problem for both vMix and wirecast, or b) flaky wirecast virtual audio... :(
Before I address anything else, I want to address this, because I have a feeling this might fix everything.
I doubt the problem is in vMix.
It's possible the problem is in Zoom, however, depending on your settings. So before we go too far into trying to fix this, let's make sure that's not all it is.
Go into the "Audio" tab on your Zoom settings & uncheck "Automatically adjust microphone volume", select "Low" on "Suppress background noise", check "Show in-meeting option to enable 'Original Sound'", uncheck "Echo cancellation".
Open a new meeting, connect your audio if you don't do it automatically, click the "Original Sound: Off" button in the top left corner to turn it on, select whatever audio device (Wirecast?) your MP3 is playing over as your microphone & your headphones or speakers as your speakers. Then select the option to test your speakers & microphone. Play your MP3 for the microphone test.
If it sounds good in the test, have someone hop on a test meeting with you & doublecheck.
If it doesn't, try the below and then do it again.
Originally Posted by: randypurcell First problem, I could not even get Vmix to show up in Zoom audio.
vMix's audio outputs don't automatically show up in programs like Zoom. You would need to either:
a) Setup NDI for your audio outputs & use that in Zoom
or
b) Use a "virtual cable", such as Virtual Audio Cable or VB Cable, as the output for your bus & then select that cable as your Zoom input
Personally, I do the latter, as there's no use in potentially bogging down the network when everything's on one machine.
If this still doesn't work, you may have need to tweak some other settings, but figuring that out would require more tests.
