Originally Posted by KenB
False alarm! I tried the same connection on a different HDTV using the attached soundbar's optical cable. It worked great! Clearly, there must be something wrong with other HDTV's optical port or the cable I used.
I sent an email to Nick Leckerton asking about optical audio processing with the UHA-6S.MKII. Below is his informative and enlightening response:
"The UHA-6S.MKII does not decode compressed audio formats such as Dolby Digital. I think many TVs output this type of signal by default from the optical connector. This could explain why you're able to get signal through the amp from one TV but not another. Sometimes there is an option to set the output signal type on the TV, but sometimes there is not. The signal type you want is PCM (stands for "Pulse Code Modulated," which is uncompressed audio)."
I am unable to find any option on my Sony HDTV to change the audio format setting, which must be compressed because it does not work at all with the DAC/AMP. My Samsung HDTV, on the other hand, outputs uncompressed audio (PCM) and, of course, it works fine.