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Can I hook my HDTV up to my surround sound?

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Old 07-19-2008, 01:39 PM   #1
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Default Can I hook my HDTV up to my surround sound?

I have a relatively older surround sound system/DVD player, it is a Koss 5 Disc Dvd/cd/mp3 DVD receiver, with model number ks2503. I have some component hookups on the back as well as 2 different av hookups.

The problem is, I have my cable hooked up to my HDTV, and there doesn't appear to be any audio outs on the TV. I have a fiber optic audio hookup on my HDTV and my DVD player/surround soud system, which I hooked up, but there is only av selection modes and DVD player modes as well as a tuner for radio. The HDTV is a Vizio 22"

I don't know if there is a way you have to "turn on" the fiber optic port on the HDTV or what, because I connected a PS2 to the HDTV with the same fiber optic audio cable, and got no sound.

Last edited by firedragom; 07-19-2008 at 02:43 PM.
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Old 07-19-2008, 01:59 PM   #2
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I meant to have surround sound while watching regular cable tv
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Old 07-19-2008, 02:26 PM   #3
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Try connecting the fiber optic cable from your cable box to the Koss unit. Then put the Koss unit in Aux mode and that should get you sound.
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Old 07-19-2008, 02:41 PM   #4
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Well its basic cable, I do not have a cable box. The cable is transferred directly from a cable to the TV

Also, the only modes the DVD player has is tuner, av select, and dvd
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Old 07-19-2008, 04:11 PM   #5
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The mode would then be AV select. A cable box would give you many more audio options.
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Old 07-19-2008, 05:24 PM   #6
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Originally Posted by firedragom View Post

I don't know if there is a way you have to "turn on" the fiber optic port on the HDTV or what, because I connected a PS2 to the HDTV with the same fiber optic audio cable, and got no sound.
The fiber optic port on your TV is an audio output. It is designed to output the digital sound from your TV's buiit-in digital ATSC (OTA) and/or QAM (digital cable) tuners. On some TVs, such as my Sony, the optical ouput is automatically activated when either their ATSC or QAM tuners are in use. On other models the optical out is only active if the TV's speakers have been turned off
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Old 07-19-2008, 05:51 PM   #7
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And to add to that, many only output stereo sound not surround.
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Old 07-19-2008, 06:21 PM   #8
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You will only get DD 5.1 if the channel you are watching is both digital and showing a program with a 5.1 soundtrack. Since you aren't using a cable set top box or cable card (no cable card, yes?), that pretty much means the only possible programs with 5.1 outputs are your local HD stations. Cable companies have to give you the locals in HD. But, they encrypt all the other HD sources so that you have to get a set top box to receive them.

Your Vizio should output 5.1 from sources processed by its own internal tuners. That's the only reason it has a digital output - so that people watching over the air TV or direct cable feeds can get 5.1. Surround sound from other external sources such as a cable or satellite box or a DVD player will be downmixed to stereo by most TVs.

But, of course, you first have to get any kind of sound from the TV to the sound processor. Make sure you are running from the digital output on the TV to the digital input on the receiver. Check the Vizio manual to see if it says anything about activating the digital audio output. That's not likely, but it's possible, of course. As for the receiver, I'd first try plugging a DVD player into the digital input to make sure you can get it to work properly. If that works, unplug the DVD player and try the TV on the same input.

Last edited by BIslander; 07-19-2008 at 06:29 PM.
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Old 07-19-2008, 07:49 PM   #9
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I was told that I may have to assign the digital input to one of the sources on my receiver, which I assume means change one of the av composite audio connectors to receive sound from the optical in connector. Problem is, I have lost the receivers manual and have searched for it on the internet all day but to no avail. So basically, as I have no idea how to change that, or if it needs changed at all, I am kind of screwed. That seems to be the only thing that makes since as there is no button to simply "turn on" the optical in.

Also, upon looking at the settup menu of the receiver, it asked about digital audio being DTS or Prologic, and on the tv, it says PCM or RAW for the digital out.
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Old 07-19-2008, 08:59 PM   #10
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Receiver - DTS, TV - PCM. At least that's how it works on my Koss system.
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Old 07-19-2008, 11:32 PM   #11
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Quote:
Originally Posted by firedragom View Post
I was told that I may have to assign the digital input to one of the sources on my receiver, which I assume means change one of the av composite audio connectors to receive sound from the optical in connector. Problem is, I have lost the receivers manual and have searched for it on the internet all day but to no avail. So basically, as I have no idea how to change that, or if it needs changed at all, I am kind of screwed. That seems to be the only thing that makes since as there is no button to simply "turn on" the optical in.
Receivers usually have physical inputs with names like Optical 1 and Coax 2. Receivers also have names for playback sources such as DVD, Cable TV, and so on. Assigning the input means telling the receiver what physical connection you want it to use when you select a source. If you are plugging the optical output of your TV into Optical 1, then you need to tell the receiver that the Cable TV source is using Optical 1 for audio. The manual would be helpful. But, even without it, look for a menu where you can associate input jacks with playout sources.

What kind of audio inputs are available on the back of your unit and what are they called?

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Also, upon looking at the setup menu of the receiver, it asked about digital audio being DTS or Prologic, and on the tv, it says PCM or RAW for the digital out.
Are those the only two choices on the receiver setup menu? That would be odd since the vast majority of digital sources are Dolby Digital. Most receivers have an Auto setting where the AVR processes whatever format is being sent, DD, DTS, or PCM. On the TV, you don't want PCM, which is limited to stereo over an optical connection. You want the TV to pass the DD 5.1 bitstream to the receiver for decoding. So, try the RAW setting. RAW is certainly not an actual audio term that has any meaning.
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Old 07-20-2008, 01:56 PM   #12
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What kind of audio inputs are available on the back of your unit and what are they called?
There are 2 coaxial, 1 optical in, and 2 sets of composite connectors as well as 1 set of component connectors

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Are those the only two choices on the receiver setup menu? That would be odd since the vast majority of digital sources are Dolby Digital.
Yeah I meant Dolby Digital, not prologic, my bad.

I have looked at all the settup menus with still no luck, and I am about to give up on this until I can find another manual online. I am afraid without the manual, there is nothing more I can do. I would imagine there is some button combination or something I press which would allow the DVD player/surround sound to register the optical in and have that work when I select an av mode instead of the composite audio connectors. Unfortunately, an online manual of my model seems not to exist, I searched for like 2 hours for one, though the model relatively old.
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Old 07-20-2008, 03:29 PM   #13
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That's too bad about the manual and the fact there is no obvious setup menu for the external inputs.

You mentioned that the source options are DVD, tuner, and A/V Select. I presume DVD refers to the internal 5 disc player. Tuner can't refer to any of the auido/video connectors on the Koss. It's got be a tuner for a radio or TV signal.

That leaves A/V Select. If there aren't any menu choices for A/V Select, perhaps that means you are limited to one external connection and the Koss will play whatever component is attached. In other words, it may be that all the audio and video inputs are permanently associated with A/V Select and you don't need to do a digital input assignment. Just plug something into any of the input ports, go to A/V select, and you see/hear whatever is there.

You may want to contact Koss and see it they can explain how it works or hook you up with a source for the manual.
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Old 07-20-2008, 05:13 PM   #14
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I FIGURED IT OUT! YESSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS

This has annoyed me so much, but upon just playing with pressing buttons I was able to do it. Basically, I went to av selection mode, started pressing buttons on the remote, and upon pressing menu, some things came up on the display. I scrolled through until I came upon input and changed it to optical and BAM, surround sound (well not complete surround sound, stereo sound, but it works hehe.)

Whew, glad I figured that out. Thanks everyone for your input, it has all helped immensely.
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Old 07-20-2008, 06:30 PM   #15
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Congratulations. Glad you figured it out.

As for multichannel sound, you should be able to get it from your TV. Assuming you are able to get your local stations in HD with your direct cable hookup, wait for a primetime show with 5.1 audio. It ought to come through the TV to your receiver as DD 5.1.

If your system does any digital signal processing, you can apply ProLogic II to any stereo source, which produces an anchored center channel for dialog along with surround channels. It's not discrete 5.1, but it's still pretty darn good.
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