[Colin Burwell]

I know this thread is old, but perhaps I can help.

I too have a Black Magic Intensity Pro and encountered a similar problem. As opposed to connecting your speakers from your ‘out’ in your computer’s sound card, attach them (with adaptors) to the snake that comes with the Black Magic card.

There should be a red and white female output from the card that you can connect your speakers to (you will need a female 1/8″ to 2 male RCA turnaround).

Black Magic has a tech support you can call – which is how I discovered this solution.

I hope that helps and that I’m not too late that you have tossed your computer out the window yet 🙂