Hi everyone,

After updating to vMix version 29 and also updating the Zoom plugin to the latest version, we’ve run into an audio issue that initially caused quite a bit of confusion during a live show.

Here’s what’s happening:
We send the master audio to Zoom and on the Zoom input source we select isolated audio. However, in headphone preview (solo monitoring) we can always hear the remote guest’s isolated audio overlapping with the master output — creating an echo effect.

Even if we disable the preview for all inputs in vMix, we can still hear the remote guest’s audio.
In our settings, the Master is set to Enabled, and the Headphones are set to the correct device.
And before anyone asks — yes, there’s absolutely nothing else running on the machine other than vMix itself.

Has anyone else experienced this issue?
If this turns out to be a bug, here are the steps to reproduce and the report for the devs.

Hi,

We've seen a couple of reports of this recently and not sure why as Zoom audio functionality in vMix has not changed, and we can't replicate on our systems.

When vMix runs the zoom instance, it makes sure the Zoom app is specifically muted in all speakers on the system, so something must be causing that to change.

For anyone experiencing the issue, can you post here a list of all audio devices used on the system, and make sure all those devices are working and plugged in prior to starting vMix.
This is to ensure vMix can see all of them to mute them in Zoom correctly.

Failing that please reach out to vMix Support and send a Support Report from Settings - About in vMix, so we can gather further information on what might be happening in these cases.

Regards,

Martin
vMix

Can you confirm if anything with the audio device on the laptop is changed after the Zoom input is running?
For example, plugging in headphones later on might be enough to trigger an audio output to turn on.

Also, just to clarify, we have tested the latest plugin and are not seeing the issue in our tests, so there must be something unique about the audio setup on systems where this is happening.
We are hoping to work out what that is so we can replicate it.

It doesn't necessarily need to be different to the previous version of vMix.
But unusual in general, i.e different Audio Outputs in vMix or using USB audio devices etc.
Any information you could provide about the audio setup would help us track down what is different about the newer plugin on that laptop.