While they were "up and running" on Tuesday, there weren't any HD programs until Wed. Both L&O episodes had only center channel audio. Worked with my contact at the station and he couldn't find anything amiss...and my network contact is on vacation...so no help there. Thursday's ER and last night's L&O/Trial were in 5.1...so it must have been a network issue.
However, at least on my end, their channel balance seems way, way off. What works for virtually every other channel's 5.1, is totally unacceptable on 312, so I'm thinking that this issue can be dealt with at KPRC. I had to drop my center channel by about 20% and raise both rear channels by 50% to get anything like the proper balance.
I'd like to enlist some of you to check out maybe tonight's NASCAR race, Sunday's L&O/Criminal and Crossing Jordan, and Monday's Macy fireworks and Medium. I don't know if the fireworks will be 5.1...but the episodic programs should be. KPRC's system is automatic...and reverts to 2.0 when no 5.1 is coming down the line...such as commercials, local cut-ins, etc. So...don't panic when that occurs.
Please post your results or PM me...so if the problem is widespread, I can work with my contact at KPRC to realign their output levels. Sometimes...we all just have to pitch in and help...especially when the technology is still evolving.
BTW: Our NBC network contributor (Programming forum) notes that they will have 2 HD equipped choppers in the air for the Macy's fireworks display, so it might well be worth checking out.