Originally Posted by Silverfox1
IMO if folks dont mind using their Amplifier remote it is best to use a Toslink optical audio cable directly out from the back of the client provider cable box to the Amp. I did this in the past and received Dolby DTS or whatever was being broadcast correctly and my Onkyo processed it just fine. If not as KryptoNyte states you will get only 2 ch. stereo PCM coming out of the Sharp TV. Note that within the menu tabs of your client provider cable box using its remote you will find a selection under options/audio to either select " PCM or Bitstream" or " Stereo or Surround " . I have ATT Uverse.
I was actually using the solution you mention, optical out of the actual source, optical into my older receiver, to pass bitstream Dolby Digital AC3 or DTS directly, but as I mentioned earlier in the thread, there are problems with this setup. If you have any post-processing enabled on the television, and probably to a lesser degree if you don't, you will find that the audio plays about 80 to 120 miliseconds ahead of the video on the television. This doesn't seem like much delay, but it is extremely annoying. I was told on another forum that my optical cables were old fashioned, so I started to investigate other options.
The only solution I was able to find to remedy the video delay was to find an HDMI based receiver. So I bought a very cheap Yamaha that has 4 or 5 HDMI inputs, has one single ARC compatible HDMI output to the TV, and most importantly, has the ability to allow me to dial in a delay on the audio signal to try and fix Sharp's audio sync problem.
Now, had Sharp not made the blunder of the decade by releasing a beautiful 70" television that did not allow for bitstream passthrough of HDMI input source audio via the optical out on the television, we wouldn't have this serious issue on our hands. It's worth noting that if you allow the TV's internal tuner to tune over the air HD broadcasts available in your location, or if you plug a USB drive into the TV with mp4 or mkv DTS files on them, it WILL in fact pass the bitstream audio correctly, so one wonders if there is a software fix that could be applied to the TV via firmware update to resolve this Sharp blunder.Edited by KryptoNyte - 11/30/12 at 4:31pm