I guess if Dolby True HD or linear pcm can't travel via SPDIF, then less they can travel through a Mono/stereo cable. I ask because the only output from my mac book pro is a mono plug, which at best can become stereo on the other end. So the best I can aspire I guess is connect this stereo end to my dolby surround amp and have it simulate surround effect.
Or.... connect the mac book pro via firewire to an external sound card, which I have, which has digital output (rca) and connect this to my amp.
I might give this a try one day.
Anyone bought a movie in HD from iTunes worth testing?