Hi all. I've been making use of a couple of external audio outputs for some time now. Bus A handles a virtual cable to feed audio into Zoom/Teams calls etc and Bus B handles an audio out to my Blackmagic Video Assist for a hardware based capture. This has worked for as long as I can remember and all of a sudden it doesn't work. Audio being sent to the bus, but nothing picked up by the device.

However, if I set my Windows audio to go straight to the Video Assist, it's working fine. This is being sent via HDMI. I can try utilising a different bus, makes no difference. I've tried restarting vMix, restarting the machine, restarting my Video Assist in different orders and still it won't work. I was sat on a version of vMix 25 so updated to vMix 26 just to see if that might fix the issue and still nothing.

I have got three instances of the same device showing when I go to select the device (BMD HMDI) from the audio output settings, which never used to be the case. I've tried selecting all three of these and none of them work. I've disabled the ones that are shown as "unplugged" in Windows sound settings and I still get three in the list in vMix.

BMD-HDMI.png (41kb) downloaded 0 time(s).

I'm out of ideas, nothing has changed between this working just last week, to now just not working at all - so has anyone experienced this before or have any idea what might be the fix?

Thanks in advance for any responses.