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Adding Zoom calls to vMix from the same computer

This guide will explain how to send and receive video/audio between vMix and Zoom, using the same computer.
Note that using the same computer will contribute to the overall system usage and performance. So our recommended method is to add Zoom calls to vMix using two separate computers on the same network. A guide on how to do that is below:
If you would like to use Zoom and vMix on the same computer, we recommend monitoring the performance on the system. You can do this by checking the usage statistics at the bottom left corner of vMix:


  1. Zoom web conferencing software
  2. A licensed copy of vMix
  3. VB-Cable Virtual Audio Device software - https://www.vb-audio.com/Cable/
  4. Latest version of Newtek's NDI Tool Pack which contains the NDI Virtual Input program we will be using in this guide. https://ndi.tv/tools/
  5. Two separate displays connected to the same graphics card.


Step 1

Firstly make sure that both the VB-Cable Virtual Audio Device and NDI Virtual Input programs are installed via the links provided above.
Open vMix and select the Settings button from the top right hand corner.

Step 2

Select the Outputs/NDI/SRT tab. Next to Output 1, tick the NDI button so it is green and says NDI On.
Next click the cog icon to the right of this and select BusA from the Audio Channels dropdown menu. This will enable the NDI output from vMix with BusA audio included. Using Bus A audio means we can control what audio is sent back to Zoom - to avoid any audio feedback.

Step 3

Next go to the Audio Outputs tab and set the Bus A option to Enabled.

Step 4

Go to the Audio Mixer in vMix. Activate the Bus A button on any audio inputs you wish to send to Zoom. Such as your Microphone input.
You can also choose to turn down the volume of your microphone in your headphones so you don't hear your own voice. To do that, click the cog icon button on the audio input to open its audio settings. Then turn down the headphones volume in the bottom left corner all the way down.

Step 5

Open the NewTek NDI Virtual Input program that comes installed with the Newtek NDI Tools pack. Once running, click the arrow in the task tray at the bottom right of Windows and right click the yellow and black NDI icon. Select your computer name -> then select vMix - Output 1.

Step 6

Open Zoom and start your meeting. Make sure Zoom is displayed fullscreen on a secondary monitor as this will allow us to capture it into vMix.
Firstly, we will configure the Zoom audio. Select the arrow next to the microphone icon in the bottom left corner. Then choose the following:
Microphone: Line (NewTek NDI Audio)
Speakers: CABLE Input (VB-Audio Virtual Cable)
The Microphone option will send audio from vMix to Zoom. The Speakers option will allow us to send the audio coming out of Zoom into vMix.
Next we will configure the Zoom video source. Select the arrow next to the camera icon in the bottom left corner. Then choose the Newtek NDI Video option.

Step 7

Once your guests have joined your Zoom meeting, we can now add them into vMix. To add the video, select the Add Input button from the bottom left corner. Then select the NDI / Desktop Capture tab. Choose the Local Desktop Capture button from the top. From here, we need to select the corresponding display number that you have Zoom currently displaying on. If you have two monitors, this will usually be Display2. Select the Display2 option and press OK. (Note: Do not select the Zoom program option as direct capture is not supported).

Step 8

Next we will add the audio coming from Zoom. Select the Add Input button from the bottom left corner. Then select the Audio Input tab. From the Audio Device drop down menu choose CABLE Output (VB-Audio Virtual Cable). Then press OK.

Step 9

Now that our Zoom video and audio is in vMix, we can use it as part of our production.
(Note: Make sure not to enable the Bus A audio button on the Zoom audio input (Audio CABLE Output) so that the guest does not hear their own audio back as an echo).

Last Updated: Wednesday, 25 March 2020 11:38:27 AM