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Windows 7: SPDIF multichannel audio sync problem.

13 Jun 2009   #1

Windows 7
SPDIF multichannel audio sync problem.

I've been testing several Windows 7 builds and the most current 7229 x64 and still experience a strange problem I have not yet figured out. Any experts out there with a suggestion or some information would be highly appriciated as the problem is driving me nuts!

I have my HP Pavilion dv5 Notebook PC connected to a Samsung 40" LCD TV (HDMi) and sound with an optical TOSlink to a Pioneer multichannel reciever through a Creative X-Fi Surrround 5.1 USB sound card (Creative beta Windows 7 driver installed).

The audio seems perfectly fine until I try playback a multichannel (Dolby Digital or DTS) source like a DVD. The audio seems too hasty and payback at a (increasingly) faster rate than the movie. This is increasingly noticable during playback and after a minute the voice sounds way before the lips move.

With a stereo source or SPDIF passthrough switched off there are no sync problem.

I find the problem strange as the same cable are used for both, but only with SPDIF passthrough enabled the problem occures.

I would highly appriciate any feedback to my issue. I've tested all to my knowledge. Thank you in advance

My System SpecsSystem Spec
15 Jun 2009   #2

Windows 7

Any ideas?
My System SpecsSystem Spec
15 Jun 2009   #3

Windows 7 Build 7260 x86

I've got a very similar setup and I just threw a DVD in. I don't have the same issue however. When i use DTS i get no sound and when i run Dolby I get sound. However, I've never gotten surround to work properly. The DVD is currently playing on all 5 speakers. I believe the front and rears are acting the same, the center is different however. When i run a sound test, I only get sound from the front R&L and the center, never from the surrounds.

The AMP is fine as when i run it's sound test it is capable of pushing to all 5 speakers, so I fear the problem then lies with the Creative drivers.

Now the only reason I mention any of this is for background...

I've got Matroska pack installed on the PC as well however. I've also got DIVx package installed. I think having these additional decoders ensures the proper codec decipher what your viewing.
My System SpecsSystem Spec

16 Jun 2009   #4

Windows 7

I believe your right.

It is not a codec problem as it will occure with a DVD inserted and no codec installed. Creative are very slow developing drivers and my hope was that there were a way around the problem. Seems the only thing to do is to wait for a new driver then.

I'll definatly never buy creeative again, they have no customer support what so ever and the drivers are very poor and never updated.
My System SpecsSystem Spec

 SPDIF multichannel audio sync problem.

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