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Audio pass thru...

bingotem
07-07-2006, 07:30 AM
Does anyone know if the new Sony A2000s (or another TV from someone else for that matter) will pass audio thru the optical digital out?
I.E. plug a PC into the VGA/audio in. Will the sound make it to the home theater receiver via the TV's digital out?
Or, if you happen to have a video/audio source comming in via HDMI.

I've read that some cable boxes digitize analogue sound and sends it via digital out. Maybe I'm asking too much of a TV...

deadhead68
07-07-2006, 07:56 AM
Does anyone know if the new Sony A2000s (or another TV from someone else for that matter) will pass audio thru the optical digital out?
I.E. plug a PC into the VGA/audio in. Will the sound make it to the home theater receiver via the TV's digital out?
Or, if you happen to have a video/audio source comming in via HDMI.

I've read that some cable boxes digitize analogue sound and sends it via digital out. Maybe I'm asking too much of a TV...

My Toshiba 52HM95 will pass digital audio out. However, only when the input is coming from the ANT1 connection. Which is where I have my OTA connection coming in. It will not pass it through from the HDMI inputs. I don't know about the Sony's.

Hope this helps.

DeadHead68

bingotem
07-07-2006, 09:02 AM
... ANT1 connection. Which is where I have my OTA connection coming in.
DeadHead68

Your TV has a bulitin ATSC tuner?
This being the case, I would assume the TV is just processing its signal source and sending the audio part to the HT receiver. Not really a pass thru, it is just doing its job.

I'm presently at capacity with the digital inputs on my HT receiver. I will soon be purchasing my 1st HDTV (most likely one of the new a2000s), which will make one more digital input that I can support if I use OTA.

I understand there are switchers out there, but I don't think I want to get into that.

The contingieny plan is just to watch HD content from the cable box. As I gather from reading other posts on this site, there should be a gain in PQ from OTA HD. But this may not atone for the loss in SQ by using analogue audio (not to mention no multi-channel audio...).

A perfect souloution would be if the TV could pass the digital audio from the cable box (will be connected via HDMI) thru the TV's optical out. I just don't know if this will happen. Is this something that some HDTVs do?

Sorry for adding on questions to one post, but does anyone happen to know what a typical audio bit rate is for OTA HD? Only 1 dig input on my receiver can do 192khz (presently, DVD player is on this one). The others can only do up to 96khz. Will this be an issue with OTA (or cable for that matter)?

deadhead68
07-07-2006, 10:30 AM
A perfect souloution would be if the TV could pass the digital audio from the cable box (will be connected via HDMI) thru the TV's optical out. I just don't know if this will happen. Is this something that some HDTVs do?

Why do you need the TV to pass the digital audio from the cable box to the HT? Why not go directly from cable box to HT with the digital audio?

By the way, when I switched from D* to Comcast Cable here in Chicago, I did not see any difference in PQ between OTA and Comcast. I even had neighbors come over to judge. Nobody could tell the difference. The only reason I still have my OTA hooked up now, is that Comcast doesn't offer my local WCIU channel in HD. And the Sox play some games on that channel. Gotta love baseball in HD!!!

Hope this helps.

DeadHead68

stchman
07-07-2006, 11:48 AM
Does anyone know if the new Sony A2000s (or another TV from someone else for that matter) will pass audio thru the optical digital out?
I.E. plug a PC into the VGA/audio in. Will the sound make it to the home theater receiver via the TV's digital out?
Or, if you happen to have a video/audio source comming in via HDMI.

I've read that some cable boxes digitize analogue sound and sends it via digital out. Maybe I'm asking too much of a TV...
I dont know, I take the optical output on my DISH box and run it directly to my 5.1 receiver. I take the DVD players' coax out directly to the receiver as well. This arrangement works well.

CraterGrillo
07-07-2006, 11:53 AM
Does anyone know if the new Sony A2000s (or another TV from someone else for that matter) will pass audio thru the optical digital out?
I.E. plug a PC into the VGA/audio in. Will the sound make it to the home theater receiver via the TV's digital out?
Or, if you happen to have a video/audio source comming in via HDMI.

I've read that some cable boxes digitize analogue sound and sends it via digital out. Maybe I'm asking too much of a TV...

I know that last year's SXRD sets have an optical output, BUT it's only there for when you use the tuner input. Bizarre. I had hoped to use it to reduce audio-lip-sync, but it wouldn't work the way I wanted.

bingotem
07-07-2006, 12:29 PM
Why do you need the TV to pass the digital audio from the cable box to the HT? Why not go directly from cable box to HT with the digital audio?

DeadHead68
That's how I've had it set up, and that's what I'll probably end up doing after I get the HDTV.

The problem is with the number of digital inputs on the HT receiver. My HT receiver has 3 digital audio inputs. 1 for DVD, 1 for xbox, 1 for the cable box, so all are used.
If I want to be able to use OTA HD, there are no more digital audio inputs available, so no digital audio from OTA. Hence, the pass thru question. If it would work, I could have the cable box passing thru the TV. So that would be 4 sources, but still using 3 inputs of the HT receiver.

I'm starting to wonder if upgrading the HT receiver would be worth it. IDK, maybe I'll be happy enough with cable HD and not use OTA... We'll see.

stchman
07-07-2006, 01:02 PM
That's how I've had it set up, and that's what I'll probably end up doing after I get the HDTV.

The problem is with the number of digital inputs on the HT receiver. My HT receiver has 3 digital audio inputs. 1 for DVD, 1 for xbox, 1 for the cable box, so all are used.
If I want to be able to use OTA HD, there are no more digital audio inputs available, so no digital audio from OTA. Hence, the pass thru question. If it would work, I could have the cable box passing thru the TV. So that would be 4 sources, but still using 3 inputs of the HT receiver.

I'm starting to wonder if upgrading the HT receiver would be worth it. IDK, maybe I'll be happy enough with cable HD and not use OTA... We'll see.
Does your cable box have a built in ATSC tuner? If it does then hook up the OTA to the cable box. I know DISH and DirecTV have built in ATSC tuners that integrate into the program guide as well. The only probelm with cable companies HD locals is that they dont give you all the subchannels. For instance my Ch 9 here has 9.1, 9.2, 9.3, 9.4. The local cable company only gives you 9.1. If not, you can still use OTA and listen to it through your TV speakers or run it red/white analog audio. You can get a box that will switch all your audio sources including optical/coax.

CraterGrillo
07-07-2006, 01:22 PM
Does your cable box have a built in ATSC tuner? If it does then hook up the OTA to the cable box. I know DISH and DirecTV have built in ATSC tuners that integrate into the program guide as well. The only probelm with cable companies HD locals is that they dont give you all the subchannels. For instance my Ch 9 here has 9.1, 9.2, 9.3, 9.4. The local cable company only gives you 9.1. If not, you can still use OTA and listen to it through your TV speakers or run it red/white analog audio. You can get a box that will switch all your audio sources including optical/coax.

Of course if you use red/white audio cables you'll lose all except for basic pro-logic decoding.

deadhead68
07-07-2006, 01:51 PM
That's how I've had it set up, and that's what I'll probably end up doing after I get the HDTV.

The problem is with the number of digital inputs on the HT receiver. My HT receiver has 3 digital audio inputs. 1 for DVD, 1 for xbox, 1 for the cable box, so all are used.
If I want to be able to use OTA HD, there are no more digital audio inputs available, so no digital audio from OTA. Hence, the pass thru question. If it would work, I could have the cable box passing thru the TV. So that would be 4 sources, but still using 3 inputs of the HT receiver.

I'm starting to wonder if upgrading the HT receiver would be worth it. IDK, maybe I'll be happy enough with cable HD and not use OTA... We'll see.

Oh, okay. Now I understand. I wasn't factoring in the xbox taking up a digital audio input. Unfortunately, I really have not heard of a TV being able to pass the digital audio it receives from the HDMI to the digital audio out. I could be wrong, but I really don't think you can. Looks like an upgrade to the HT is in your future. :D

DeadHead68

clearday
07-07-2006, 02:05 PM
I have an HD cable box with component, and a DVD with HDMI going into my Sammy 1080p and one optical cable going from the TV into the optical in on my receiver and all the sound works well, no lip sync, etc., so it appears to me that HDMI works thru the TV as well as component. PCM only but good surround sound.

deadhead68
07-07-2006, 02:14 PM
I have an HD cable box with component, and a DVD with HDMI going into my Sammy 1080p and one optical cable going from the TV into the optical in on my receiver and all the sound works well, no lip sync, etc., so it appears to me that HDMI works thru the TV as well as component. PCM only but good surround sound.

I stand corrected. Wish it worked on my Toshiba.

DeadHead68

stchman
07-07-2006, 02:17 PM
I have an HD cable box with component, and a DVD with HDMI going into my Sammy 1080p and one optical cable going from the TV into the optical in on my receiver and all the sound works well, no lip sync, etc., so it appears to me that HDMI works thru the TV as well as component. PCM only but good surround sound.
You can set the DVD HDMI sound to DD/DTS instead of PCM. This will cause the sound to pipe through DD. You will lose sound on your TV with DVD. My sat box has HDMI as DD and PCM so I get both. I dont know if your cable box has the same functionality.

clearday
07-07-2006, 02:40 PM
On the Sammy HLR series you can output only PCM thru the optical out on the tv. The other options are greyed out and not available. This is a known annoyance with the optical out. So if we want DD or true 5.1 we would have to connect the audio to the receiver, not go thru the TV. I can accept that because the sound is well handled by my Onkyo receiver using Neo 6, I get surround and I avoid lip sync. But it is a trade off.

bingotem
07-07-2006, 03:35 PM
I don't quite have the HD cable box yet. My provider (WOW) uses SA 8300s.
It's starting to sound like I should scrub the pass thru idea.