My logic is that a simple audio interface over USB would do the trick. I was thinking hooking my third ‘full-screen playback’ monitor directly over HDMI to the new Mac Pro’s HDMI port, but I still need a solution to hook up the studio monitors (audio). Since it will not be easy to recuperate the Blackmagic card, and since Premiere has always had troubles sending sound over the blackmagic card (be sure to check the numerous threads here that feature the same issues), I’m wanting to change the setup. Our current setup has a previous generation Mac Pro with a Blackmagic Decklink PCI-express-card hooking the mac to an extra external monitor and two Yamaha studio monitors for sound. My facility will be updating to the 2013 Mac Pro soon and we are looking how to transfer/support some of our existing hardware to work with the new Mac Pro and it’s new interfaces (USB3/Thunerbolt).