Originally Posted by powrwrap
I want to make sure I understand what is being discussed here. I have my cable box connected to my LG TV via HDMI. I have a PS3 connected to the LG TV via HDMI. I use an optical cable to connect my TV's audio to my older, non HDMI, audio amp/receiver. Any Dolby Digital inputted to the TV via HDMI is NOT supposed to leave the TV's optical out as digital surround sound, only 2 channel audio will be outputted. Is that correct?
Here is a page out of the User's Manual which apparently shows that the TV should output Dolby Digital.
I ask because I DO get digital surround sound when using the PS3 but NOT when using the cable tuner box. Are you saying if I want to get Dolby Digital from my cable box to come out of the TV's optical audio out I need to get into the service menu (using a separate remote) and switch the TV audio output setting from PCM to AC3. Is that correct?
I understand the confusion, I'll try to narrow it all down.
1. The change in the TV "secret" menu, using the separate remote, from PCM to AC3 allows sound coming from the TV itself
- not from anything plugged into the TV via HDMI, to be in DD surround using the optical out. The diagram you show will only work if you make the change in the hidden menu. The significance is that there is no other way to get that sound to be in DD surround, other than the optical out. Anything plugged into the TV via HDMI will not pass through the optical out as DD surround but that sound does not have to go through the TV's optical out, so not as much a limitation as maybe an inconvenience. The real plus is sound from OTA, or Vudu, etc... from the TV.
2. Things like the TV satellite or cable box, or a Blu- ray/DVD player etc.. can be plugged directly into your audio receiver, either through HDMI or Optical.So that is why it's not a big deal for most that they won't pass through the TV's optical out. If you have a newer audio receiver you do not want to go through the TV anyway, you want to go through HDMI to get the best sound especially from Blu-rays.
3. And I note the information given to that OP by whoever he talked to is wrong, you do not change to PCM.