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IanThFlag for United Kingdom of Great Britain and Northern Ireland

asked on

use tv as center speaker

why can't you use a tv's built-in speakers as the center channel in a 7.1 or 9.2 or am I missing something here

it would definately help persuade the missus lol
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Rob Knight
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Hi,

Do you have a 5.1 or 7.1 output on you receiver?

Simply route all video via your receiver so that does the switching and connect your 5./7.1 centre speaker output to the 2 RCA phono inputs on your TV.

Then configure the TC to take sound from the AV input.

You may have to disable the Centre output on your A/V receiver or set the Centre speaker as missing.

Regards,


RobMobility.
Avatar of IanTh

ASKER

my tv does not have any sound inputs it was a generic question as to why this was not an option
I have 7.1 and maybe going 9.2 next

If I understand your question, in an enviroment where 7.1 surround is used, or 5.1 is still the most common used today, or any surround sound each speaker is designed to accept incoming frequencies as per it's source and the speakers inside the box each recevies a different frequency as per the source.
A TV speaker is whole different type of speaker in itself..not very good shielding and or magnet.
for example if you play a mono ( single audio)  audio it will split it into 2 speakers, that doesnt make it true stereo ( 2 speakers) so the sound will just be the same in two speakers, no surround.
It can be done but you would  just get a flat mono  sound to how many speakers you want but not true stereo surround.
True Stereo appears to float from left to right so to speak.
same principal with 7.1.
Take a look here, small extract...
 surround sound works because multiple audio channels are received through speakers that are positioned at various locations in the room. This is programmed into the source and the sound tracks are decoded when the source is played.
7.1 surround sound, which splits the single rear-center speaker into individual left- and right-rear surround. These systems are not a true discrete 7.1 channel system as 7.1 formats don't currently exist. In a true discrete 6.1 surround system, the back center surround position is separate from the surround left and surround right positions. A 7.1 channel system uses matrixed extended surround where the left-back and right-back (rear-center surround) multichannel are blended together and stored.
more here>
http://www.webopedia.com/DidYouKnow/Computer_Science/2005/surround_sound.asp
-----------------------------
The center speakers may remain silent until certain frequencies are reached causing them to fire up, . Often times you wont hear them much at all unless the Audio device  supporting 7.1 and the speakers are configured correctly and the person is seated in the center to hear the effects.
Most DVD only support 5.1 so in order to achieve these 7.1 you need a garranteed 7.1 audio on the media  DVD and supporting Media PLayer,
so if the TV is not a true 7.1 surround sound setup then it would be difficult to use it's center speaker as a center Speaker part of 7.1 setup.
the frequencies send from a true 7.1 AMP to a simple TV stereo speaker is really fruitless if you want quality sound
In my humble opinion you may get the amp to send audio to that single speaker in theTV but because it is not setup as part of the 7.1 ( 7 speakers setup) sub woofer tweeter etc it woudlnt be much good. Just audio.

this may also assist you
"5.1, 6.1, 7.1 Surround Sound...What Really Is   The Difference?"
http://www.affordablehometheater.frank-marketing.com/5.1-Surround-Sound.html
Avatar of IanTh

ASKER

yes but 9.2 is also out and on my radar for next year probably and the center speaker in 5.1 , 7.1 and 9.2 is always going to be the same as its for dialogue not stereo so what I am saying its a question why arent tv's being used for the centre speaker not the whole 7.1 just centre

my denon amp up scales 5.1 to 7.1  
I believe that there is no TV programs that support this 7.1 stereo surround
Other than maybe digital and high definition channels
Cinema and soundtracks on the high definition digital TV channels represent the major uses of surround techniques.
Connecting a TV to this Denon would be via a composit or S-video or RCA, this audio input channel does not support Dolby Digital 5.1 etc surround sound only the standard stereo as per the red and white cable left and right audio

I'm not fully  understanding what you want please forgive me if I am not answering you fully.
You have a Denon amp with 7 speakers connected to it?
And wish to connect a TV as center speaker?
So that you can watch TV in 5.1 and or 7.1 surround sound?
In most cases, surround sound systems rely on the mapping of each source channel to its own loudspeaker not through another port such as AVS or RCA.
Matrix systems recover the number and content of the source channels and apply them to their respective loudspeakers.
With discrete surround sound, the transmission medium allows for (at least) the same number of channels of source and destination.

You can use this TV as an extra speaker but would only be just that an extra speaker sharing the audio in a mono form.
Avatar of IanTh

ASKER

no your missing my point

all my sound is piped to my denon and what I am saying why cant the tv makers put a speaker input for a 7.1 or 9.2 amp to connect the center spearker output to the input on the tv so it uses its built in speakers as the center channel so you dont need a seperate center speaker and all tvs speakers are capable as the center speaker is always dialogue
Avatar of IanTh

ASKER

my amplifieir splits the sound so I just wanted to know if its posible to feed the centre output from my amp so my tv speakers can be the centre speaker  

A tv speaker not very well sheilded that cannot be true
The only way this maybe possible is to grab the wires off from the internal  TV speakers and hot wire ( join them twisted  ) to this center speaker left and right
Or what I do to connect my TV audio to my AMP, My TV  has AVS 1 and AVS 2  DVR etc,
if your TV has an AVS 1 you should see three sockets one white one red <audio LnR and one yellow <video.
audio left and right you can use RCA to 3.5mm  composite red and black plug that into the TV AVS out
plug the other end into the LCD or CD -DVD socket on  AMP
Then switch the amp to this lcdvd  and presto you now have TV through stereo.
http://en.wikipedia.org/wiki/RCA_connector
Avatar of IanTh

ASKER

hang on just thought would it be better to find a way of injecting the centre out from my amp into the hdmi is that possible that would mean the hdmi is just carrying the centre channel
Hi,

You could use an HDMI to DVI cable to a StarTech DVI to HDMI adapter box from your receiver/source, feed your AV/source output to the adapter with your centre audio out feeding into the box with HDMI as the output going to the TV?

http://intrl.startech.com/AV/Converters/Video/DVI-to-HDMI-Video-Converter-with-Audio~DVI2HDMIA

Regards,


RobMobility.
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Rob Knight
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Avatar of IanTh

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and use dvi-d to hdmi adapters if there are only hdmi as my tv only has hdmi in and my amp has hdmi out

will it still carry hdcp ?
Hi,

Tech specs of the converter I suggested state HDCP compliant?

HDMI out from receiver to DVI-D on adapter (HDMI to DVI-D cable), HDMI out from converter to HDMI in of TV?

Regards,.


RobMobility.
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ASKER

the speaker impedence would need to be set on the amp got any clue about tv speakers impedence
I use a 3 way  splitter, this one, not fancy but it works
http://www.ebay.com.au/itm/3-Way-Audio-Video-AV-RCA-Composite-Switch-Switcher-Splitter-Cable-XBOX-DVD-/150676300960?pt=AU_Television_Accessories&hash=item231501e4a0
This way I can switch the audio input output from My PC, from my TV and from the Cable box and any devices I attach as I just dont have enough sockets from my TV
 but this should be similar to  the hdmi adapter provided if you connect that to your AMP.
http://intrl.startech.com/AV/Converters/Video/DVI-to-HDMI-Video-Converter-with-Audio~DVI2HDMIA

your amp should have full conrol over which speakers to use or which  volume setting to use.
I have full control over my speakers front rear center levels via the remote control.
Impedence is controlled by the setting such as surround. prologic stereo etc.
Hi,

If you're using the AMP, assume you are using the RCA/phono CENTRE line out from the Receiver NOT the amplified output.

What receiver do you have?

Regards,


RobMobility.
Avatar of IanTh

ASKER

denon avr 2310

it does have an impedence setting I remember setting it up when it was new

I do intend to use the centre out and replace my centre speaker with the tv speakers as the centre speaker is not in a good position and I need that space for a nother device I am thinking of purchasing so there is no where else to put the centre speaker and thats why I thought of this way
Hi,

You'd need to connect the Centre Channel Pre-Out on the Denon Receiver to the Audio In on the DVI to HDMI adapter - that would then be passed through to the TV over HDMI?

You may want to use a single RCA to dual RCA so that both TV speakers are used?

Regards,


RobMobility.
Avatar of IanTh

ASKER

I have noticed on my tv if I use hdmi2, as it has 2 hdmi inputs, I can use an audio l and r that connected to that hdmi so cant I use just use a stereo audio (old style white and red) as the input is stereo and the output is mono I can just send mono to both inputs so both speakers have the same sound output yes?

Hi,

If I am reading this correctly, that is what I originally suggested - use 2 audio inputs on the TV? What is the TV - does the HDMI 2 have separate audio via 2 RCA phono sockets?

Anyway, I cannot see any reason why you can't do this - that was my suggestion for the DVI-D to HDMI converter with audio in.

Regards,


RobMobility.
Avatar of IanTh

ASKER

I did not know that my tv has on hdmi2 in it has audio in for old stuff that did not include sound on hdmi so I am thinking that the dvi-d adapter is not neaded just a audio old style rca  from the center output but I think my centre output is nor pre amp that is going to be a problem isn't it
Avatar of IanTh

ASKER

as my amp does not have center pre outs if I use the sound + dvi-d adapeter does that mean I can do it without pre-outs and use the center output into the adapter sound in or would that not work