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Old 05-23-08, 07:18 AM   #25
omg_dastard!
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

moviez


Can games do DTS?


Would I see a large difference with DTS? Ive always been curious because loads of my DVDS have got DTS on them.
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Old 05-23-08, 07:37 AM   #26
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

DTS is better than DD on most DVDs, it can be a slight difference, or a large one.

There are few games that use DTS, none on PC, you'll only find them on PS2 and PS3.
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Old 05-23-08, 08:04 AM   #27
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

Its all here in this thread, but here is a basic overview.

DTS = 5.1 surround sound compression method
Dolby Digital 5.1 = 5.1 surround sound compression method

They do nothing other than allow 5.1 channels of audio to be transported in a single stream (such as one optical toslink cable). They are the ONLY common way to get a proper surround sound signal over current digital connections. The differences between them are pretty minimal to most people... they are just two technologies from competing companies.

For anything to use DTS or DD5.1 the entire stream (all of the sound you hear) has to be encoded (basically, compressed) first. DVD audio tracks are encoded and then put onto the disks permanently. Some will use DD5.1, some will use DTS, some will use multiple formats that can be selected in the audio setup menu on the DVD.

If your DVD player, or your PC, is capable of doing it, it will decode\decompress the DD5.1 or DTS track and then send it to the proper speaker outputs as 6 individual analog channels (2 to each RCA or 3.5" jack).

An alternative for a PC or a DVD player is to send the entire encoded signal over a digital connection (optical toslink or coaxial) for an external receiver to decode\decompress. The only real benefits of this method over using analog are less background noise\hiss and less cable clutter (since it only uses one wire).

For games, the process is the same but your PC has to do the encoding\compression work. To use DD5.1 or DTS, the entire stream of sound has to be encoded\compressed to be sent over an optical connection. You will need a sound card or sound chip that is capable of doing this in real time. The real-time encoding of DTS is called DTS Connect, the real time encoding of DD5.1 is called Dolby Digital Live. The Creative X-Fi is not capable of encoding DTS Connect or Dolby Digital Live with its official drivers. Therefor, you will not be able to get surround sound in games over a digital connection with an Creative X-Fi card. There are some third party hacked drivers floating around but I don't know how well they work. The exception is the Auzentech X-Fi Prelude, which will do DDL by default.

Since you are using a PC speaker system that has all of the needed 3.5mm mini jacks for analog surround sound, you have no good reason to use DTS Connect or DD5.1. Your PC can decode DVD audio and your games' audio will be sent directly over your analog connections.

You do not need digital unless you want slightly less background hiss on your speakers or less cable clutter. If you want that, you'll need another $100-$200 sound card to do it.

BTW, if you are having problems getting surround sound to work in DVDs, download and install AC3 Filter. If you are having no problems getting surround sound in games or movies, then you need nothing. Enjoy your setup.



EDIT: If you're really interested in the differences between DTS and DD5.1, go here.
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Old 05-23-08, 11:03 AM   #28
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

joly moly, that was very comprehensive. Thank you so much for your time and your effort.

Probably shouldnt have upgraded from the G500 then if Im not going to hear any difference. What a waste of $450

Thanks again for your help and ill look at that link
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Old 05-23-08, 05:59 PM   #29
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

Quote:
Originally Posted by omg_dastard!
joly moly, that was very comprehensive. Thank you so much for your time and your effort.

Probably shouldnt have upgraded from the G500 then if Im not going to hear any difference. What a waste of $450

Thanks again for your help and ill look at that link
No problem.

This topic is covered a lot here.

Unless someone sees any glaring errors in my last post I may just link that in my sig for future reference. It'd probably save me half an hour of typing every few weeks.
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Old 05-25-08, 06:17 AM   #30
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

Quote:
Originally Posted by CaptNKILL
No problem.

This topic is covered a lot here.

Unless someone sees any glaring errors in my last post I may just link that in my sig for future reference. It'd probably save me half an hour of typing every few weeks.
That is a good post, but just a suggestion for clarification: When you say X-Fi can't do DDL you should change that to Creative X-Fi can't do DDL because the Auzentech card also is called the X-Fi Prelude and it can do DDL.
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Old 05-25-08, 05:50 PM   #31
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

Well I use Dolby Digital Live myself with Optical connection.
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Old 05-25-08, 05:57 PM   #32
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

You also have a dodgey link in your sig. Reported.
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Old 05-26-08, 01:49 AM   #33
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

Quote:
Originally Posted by npras42
That is a good post, but just a suggestion for clarification: When you say X-Fi can't do DDL you should change that to Creative X-Fi can't do DDL because the Auzentech card also is called the X-Fi Prelude and it can do DDL.
Incorrect THEY CAN DO IT, there is a hacked driver out there that CAN DO IT although Creative are not happy and thinking of taking legal action against the person that hacked their drivers and enabled this feature. Creative say it was disabled due to compatiltiy/stability issues.

Since then they have enabled it on their PCI-Express cards, as you can imagine alot of people are not happy with Creatives stance in not bringing it to the PCI family offically.

http://uk.europe.creative.com/produc...&product=17791
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Old 05-28-08, 04:26 PM   #34
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

So I have it setup with the following:

5.1 in Windows Sound Devices
5.1 in Realtek Drivers (Control Panel)
&
Optical output to 44.1Khtz / 48Khtz

Only 2 channels still.


I have the latest HD audio drivers from Realtek.

What else am I missing.

How do I enable DD LIVE support.
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Old 05-29-08, 12:15 AM   #35
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

Quote:
Originally Posted by Sowk
So I have it setup with the following:

5.1 in Windows Sound Devices
5.1 in Realtek Drivers (Control Panel)
&
Optical output to 44.1Khtz / 48Khtz

Only 2 channels still.


I have the latest HD audio drivers from Realtek.

What else am I missing.

How do I enable DD LIVE support.
To the best of my knowledge, the 680i does not natively support DDL or DTS Connect- that is a feature left up to the mobo manufacturer to implement. If your onboard audio supports neither DTS Connect or DDL, then 5.1 over digital will only be possible with DVDs or via using a reciever that supports DBPL 1 or 2.
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Old 05-29-08, 02:38 AM   #36
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Default Re: Can you use SPDIF (Optical) out for gaming in 5.1 - on Nforce 680i

Quote:
Originally Posted by Redeemed
To the best of my knowledge, the 680i does not natively support DDL or DTS Connect- that is a feature left up to the mobo manufacturer to implement. If your onboard audio supports neither DTS Connect or DDL, then 5.1 over digital will only be possible with DVDs or via using a reciever that supports DBPL 1 or 2.
Not quite. If your mobo has an spdif out (optical or coaxial), it can and will output DD or DTS from it. Because the digital signal is not being encoded by the PC, it's already encoded on the disc you're playing. Therefore all your mobo is doing is sending the (pre-encoded) signal down the spdif. All you need is software like PowerDVD that can output using spdif.

VLC, SMPlayer, FFDshow and others will all output DD or DTS through spdif but need more fiddling with to do it than PowerDVD.
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