Originally Posted by DTS
I think there is a misunderstanding here. The AVR is fine.
Just because it works in any configuration does not mean that it is fine for all configurations.
I can get 5.1 DD and DTS from TV to AVR when using the Smart Hub without sync issues.
Good. But what about sources other than OTA TV that use other audio formats?
My sync issues are when using STB to AVR.
VIDEO 3 is the AVR selection for watching TV. CD/DVD is what I switch to when watching anything through the Smart Hub (Optical from TV to AVR)
No surprise there. Running digital audio out of the TV and into the AVR is almost a "can't fail" configuration.
If I have sync issues on VIDEO 3 (TV viewing) then I switch to CD/DVD on the AVR and it corrects any sync issue, but my loss is that I only get 2.0 since the sound is coming from Optical from TV to AVR as there is no pass-through on this TV.
Right. So either satisfy yourself with that, or read my post as a recipe for getting sound in synch from the STB.
Your problem is due to the fact that different signal paths have different amounts of latency (delay) for both the picture and the sound.
There is a lot of latency in most TV sets, but they delay their sound outputs to compensate for it.
Many TVs also don't support every possible surround sound format, except to provide a stereo output.
When you use sound direct from the STB you bypass the compensation in the TV set.