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Pc -> Home theatre system setup


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#1

fatalfury
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Posted 29 August 2014 - 11:29 AM

Hi, looking for some confirmation on my pc -> lg home theatre system that I got yesterday.
My motherboard is an asus p8z68v pro with the standard 7.1 minijack output and an SPDIF optical port at the back.
The home theatre receiver is an LG BH6540t with an HDMI output only and an Optical auxillary input and aux RCA input with Left and Right ports.
What would be the best way to set it up for 5.1 surround?
I'm leaning towards buying an optical SPDIF cable (wish my receiver had an HDMI input so I can connect my gfx card to it).
But I hear that SPDIF doesn't support natural 5.1 surround, I need a DTS encoder. The Asus motherboard states that it supports DTS encoding, but I'm not sure if it only applies to the 3.5mm ports or the optical port as well.
Thanks in advance :D

I've tested the PC->speaker connection through bluetooth, but due to the nature of the protocol, there's a slight audio/video sync issue which is annoying when playing games/watching movies.

#2

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Posted 29 August 2014 - 11:59 AM

SPDIF does support 5.1 or 7.1, but only if the applications on the computer end actually support it. I know VLC does, but hardly anything else from memory. It'd pay to check what application you want to support 5.1 or 7.1 and then reference it to see if it does. Some sound cards can encode DTS regardless of what the application puts out, but I think your motherboard doesn't. Don't quote me on that, it'd pay to check.

Either way, you can still get 5.1 or 7.1 by doing absolutely nothing but using VLC player, or if you want it to universally support it, then yes you will need a DTS encoder which is most commonly found in some sound cards.

EDIT:

Sorry I should definitely read your entire post before replying... If your motherboard says it supports 7.1, then I would definitely assume it would be over SPDIF. I will have a hunt down and see what I can find.

Edited by SqueedilySpoot, 29 August 2014 - 12:00 PM.

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#3

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Posted 29 August 2014 - 12:39 PM

Start off by buying a super cheap SPDIF cable from china and see if it works, and if it does then invest in a nicer one.

Eg: http://www.aliexpres.../741693036.html
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#4

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Posted 29 August 2014 - 12:42 PM

Hi, looking for some confirmation on my pc -> lg home theatre system that I got yesterday.
My motherboard is an asus p8z68v pro with the standard 7.1 minijack output and an SPDIF optical port at the back.
The home theatre receiver is an LG BH6540t with an HDMI output only and an Optical auxillary input and aux RCA input with Left and Right ports.
What would be the best way to set it up for 5.1 surround?
I'm leaning towards buying an optical SPDIF cable (wish my receiver had an HDMI input so I can connect my gfx card to it). But I hear that SPDIF doesn't support natural 5.1 surround, I need a DTS encoder. The Asus motherboard states that it supports DTS encoding, but I'm not sure if it only applies to the 3.5mm ports or the optical port as well.
Thanks in advance :D

I've tested the PC->speaker connection through bluetooth, but due to the nature of the protocol, there's a slight audio/video sync issue which is annoying when playing games/watching movies.

So the receiver only supports inputs from optical, two-channel RCA, and Bluetooth? That basically leaves you with only optical as an option.

Start off by buying a super cheap SPDIF cable from china and see if it works, and if it does then invest in a nicer one. Eg: http://www.aliexpres.../741693036.html

I agree, except I wouldn't bother with investing in a nicer one unless it is needed.
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#5

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Posted 29 August 2014 - 02:15 PM

Good good, I've been reading up more on this, and it's quite hard to find whether the motherboard supports live encoding through the SPDIF port, so I'll have to test it out.
Also, the link that tehkhop put up has a circular cable; I think my motherboard and receiver had a square connector.
Do you guys know what it's called? Want to buy it from PBTech today after work :D

#6

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Posted 29 August 2014 - 02:39 PM

I'm pretty sure that one has actual connectors that are square. But yeah, it could take a month to arrive...

It'd be either called an optical SPDIF or a TosLink cable.

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#7

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Posted 29 August 2014 - 03:39 PM

Mhm, kinda hard to tell from the photo they have. Time to run off to PBTech in 2 hours!

Thank you very much all :D

#8

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Posted 29 August 2014 - 04:42 PM

That one I linked is definitely the correct type, there is a circular port extruding from the actual connector which is what I believe you are seeing.
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#9

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Posted 30 August 2014 - 12:38 AM

Being a current owner of the Asus P8Z68-V Pro, I can say that my board's optical port wouldn't output 5.1ch to the Logitech Z906 system (only outputs 2ch), but my board's 7.1ch chipset also isn't functioning so I was expecting some issues there. I'd buy the optical cable and test it out, and if it doesn't work then get a cheapo sound card with optical output. Also, while there might be a slightly higher bit-rate, there isn't a need for "platinum-tipped, pure gold-ore, uber-high definition" optical cables, as my cheapo cables managed to output 5.1ch from my PS3 fine. But as I don't consider myself a high-level audiophile I can't confirm there isn't a noticeable difference.

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#10

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Posted 31 August 2014 - 09:11 AM

In the analogue realm, cable quality mattered, but in the digital realm it doesn't.
Digital either works or doesnt't (like a computer programme). There is no degredation in sound when outputting 1s and 0s over a short length. Ie gold plated platinum hyper speed super conducting cable with chrome plated grease nipples does not give you a better quality 1 or 0.

That is why I think (pure speculation) that Monster moved into earphones. There's not a lot of future in premium home AV cables in the digital age.



#11

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Posted 31 August 2014 - 10:57 AM

This is true for most digital signals, but not optical, where a low quality cable can easily mix 0s and 1s around, on a low quality cable it may corrupt data to the point of loss in quality, especially when you have a 7.1 output and receiver like the OP.
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#12

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Posted 31 August 2014 - 11:26 PM

This is true for most digital signals, but not optical, where a low quality cable can easily mix 0s and 1s around, on a low quality cable it may corrupt data to the point of loss in quality, especially when you have a 7.1 output and receiver like the OP.

Also, with most digital signals the quality degrades as the cable length increases so I expect higher quality cables have better data shielding, especially since optical signals are basically light rays, so beam intensity is key.

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#13

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Posted 01 September 2014 - 10:15 AM

I would assume that even with an optical cable it'll either work fine or it'll work very badly. Generally you'll only get cable-related problems when the receiver is having trouble determining between a zero and a one, and if it is having trouble in that regard with one bit it'll usually have the same problem with all the bits that come after.

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