Is there any way to use my multi channel audio interface, which is hooked up via firewire to output the surround channels. There is no decoder in the firewire device present, so I guess I would need some sort of software decoder. Is anyone aware of any solution that might fit my needs? I want to watch movies from the iTunes Store, so I guess that solution would need to integrate with iTunes. I haven't found any solution to that so far, but probably someone else has already done this?