I am so glad I stumbled upon this post. I have spent MONTHS trying to work out what was going on inside premier with my surround!
When first installed it worked perfectly, a month later all the channels were mixed up and no amount of changing assignments was going to correct the issue. The sync issue is a problem though. How have you dealt with this?
My only other related problem is surround in general from other apps and things like youtube videos. As with premier, when first installed surround worked great, but then I lost surround sound in general. Even though premier is now working again, and audition always has, I cannot get surround from my general video playback software or web videos etc. Any ideas on this?
Although I love my blackmagic device, I have been disappointed with the issues and support from blackmagic. They admit to knowing about the sync issue but seem to not really care about it. I was told “It’s a premier problem” so really one could say even though the features state compatible with premiere, it really isnt suitable at this stage. Also no help what so ever when I was trying to get to the bottom of this surround issue!