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Old 13-01-18, 17:06
TheClash TheClash is offline
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Smile SPDIF optical cables

does an SPDIF cable only send audio signals to the TV if so why not just use a HDMI? is it both video and audio and if so how do you get TV to recognise SPDIF input?
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Old 14-01-18, 19:26
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jak jak is offline
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Default Re: SPDIF optical cables

I suspect I'm not understanding this question very well so I not going to answer the question directly as I can't.

But (unless things have moved on without me knowing) I thought an SPDIF cable is specifically for carrying a digital optical signal out from a TV; it is an output from a TV not an input.

Things may have moved on but I can't really think why you might want to input a digital optical signal into a TV because the sound reproducing circuitry and speakers in any TV is, to put it politely, 'basic' and any improved sound quality would be negated when it came from the TV speakers. Or have I got the question wrong and you are talking about an output signal from a TV
Originally Posted by TheClash View Post
does an SPDIF cable only send audio signals to the TV if so why not just use a HDMI? is it both video and audio and if so how do you get TV to recognise SPDIF input?
Many modern TVs have SPDIF out connectors, they also have HDMI outputs/inputs the clue in HDMI is the HD standing for High Definition, it could be compared to ADSL broadband which uses copper cable and high speed fibre broadban which use Optical cable. HDMI uses copper and SPDIF is usually fibre.

Also HDMI connections/cables offer input and/or output signals of both video and audio via one convenient interface, providing you have the compatible devices and cables (and in some set ups HDMI switching). But! Although HDMI signals were at one time the pinnacle of quality in both sound and video, things have moved on.

Now, surround sound systems seek to provide an even more improved sound matching that previously confined to professional sound studios. These were the places where optical cables were used to achieved near perfect sound reproduction. So now many big TV names also supply surround sound systems for their TVs and consequently in the war to provide better than the competitor optical fibre cables (SPDIF) came on the scene for the sound output connection to their surround sound system.

Next came the 'sound bar' for anybody who didn't want or couldn't have the surround sound system(s) but were still unhappy with the rubbish sound from a flat screen TV's tiny speakers. It was then a logical move to include an SPDIF input for the sound bar.

So to come back to your question, with the right connector/adapter you could isolate and connect to the audio output in your HDMI connector and input that into audio jack of a sound bar or surround sound system but supposedly for even better quality sound, if your TV has an SPDIF output then by using the special SPDIF cable to the SPDIF input of your audio system better and clearer sound quality will (in theory) be acheived. (but the actual level of improved sound will usually depend on the quality of the the equipment)

Normally the SPDIF connector on a TV is output only.
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Old Yesterday, 12:37
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MeesterChris MeesterChris is offline
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Talking Re: SPDIF optical cables

Optical cables do send sound, but the tech is now outdated.

If you have a sound bar, it works, but it won't switch it on and off or add the full range of sound.

Gotcha! Neither will a basic HDMI cable!

You need a fully wired HDMI cable, which they call 'HIGH SPEED' cable.

PC World/Currys Ripoff PLC will charge you 15 to 50

Get an Amazon Basics 'HIGH SPEED' cable for 5
and the sound is amazing, also the TV will switch sound bars on and off if connected to the 'ARC' HDMI port on the TV, mine also works from the SK+ box.

One click on the Sky remote and TV and sound bar function.

Meester Chris
Don't all shout at once
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