The USB Stream connector on the VR-120HD supports both audio output and audio input with the connected computer.
When using a web conferencing application like Zoom or Teams for live streaming, the software may be set to output audio from the computer to the VR-120HD. The USB In audio channel is part of the VR-120HD audio mix, so the audience may hear an audio loop that sounds like an echo.
To help fix this, the VR-120HD has three audio buses you can separately mix: the Main bus, AUX 1 bus, AUX 2 bus. You can assign any bus to each video output connector or audio jack.
Muting the USB In audio channel will solve this issue, but if you want it to be part of your mix without outputting it to your conference application, follow the steps below:
-Example settings for mixing audio except for USB In and output from the USB Out.
- Audio Output > Output Assign > USB Out to select an output bus other than the Main bus.
-For example, select "AUX 1 Bus", as in the figure below.
- Set the USB In Send Level of the AUX 1 Bus to "-INF dB".
- For each audio channel you want to add to the AUX 1 Bus mix, change the Send Point to "Post Fader" and set Send Level to "0 dB".