We're using 2 BlackMagic DeckLink 4k cards in 1 system to send each vMix external output to different places via SDI. The 1st card works perfectly. The 2nd card is outputting video but not audio. Audio is definitely hitting the external 2 meters in the audio section though.

External 1 is set to:
video - Decklink video renderer | working
audio - Decklink audio renderer | working

External 2 is set to:
video - Decklink video renderer (2) | working
audio - Decklink audio renderer (2) | not working

We've tried different audio options from the dropdown with no luck. We also have another system running the exact same setup and both cards work perfectly. We've even replaced the 2nd card with an identical one but still no audio.

Any help on this would be appreciated.

Thanks,