Hello!

I have a problem with audio on vMix. I have added two video clips. One is a .mp4 file, the other one is a .mov file. Both have audio. I want to hear the audio through one of the Blackmagic outputs. In "Settings" > "Audio" > "Default Audio Renderer" I have chosen "Decklink Audio Renderer". I can also choose "DirectSound: Speakers (Blackmagic Audio)" which means the same.

The .mp4 video plays its audio through the Decklink Audio Renderer Output (I can hear it through the loudspeakers). So far so good.

But the .mov video plays its audio through the headphone output of my computer. I can't even open the audio settings window.
I can add any mp3 file or other mp4 videos to vMix. The audio can always only be heard through the headphones. The above mentioned .mp4 is the only file I can hear over the Decklink Audio Renderer.

I have also createt a new preset an added these videos. Same problem. What can I do?

This is my system:
2 Blackmagic Intensity Pro
Intel Core i7 CPU 6 core 3.47 GHz
24 GB RAM
Windows 7 64 Bit SP1

Thank you and best regards
Nicolas