audio problem

I have windows 7 ultimate 64 bit.I had purchased a new pc last month but did not purchase spekers now when i got them i tried and saw that voice was very unclear and slow, i tied using headphones and also tried another set of spekers but same problem,the same video file which works fine on my other pc(windosw xp sp2 based) gives very slow and unclear voice on my new pc. I have the intel DH55TC mother board.Please help me out in solving this problem

Could you provide us with the make and model of your sound card?
Simply sounds like a driver issue here, have it happen a lot on client's computers.

sound card is on board only Intel® Desktop Board DH55TC
Intel® High Definition Audio subsystem in the following configuration:

• 8-channel (5.1+ 2 independent multi-streaming) audio subsystem with three analog audio outputs using the Realtek ALC888S* audio codec

Onboard audio - Channels 5.1 channels
Onboard audio - Codec chip Realtek ALC888
Onboard audio - Codec type HDA

Ok, visit the Intel site below:
http://downloadcenter.intel.com/Sear...p+Board+DH55TC
Select the appropriate drivers for 32 or 64 bit

yea i downloaded and installed this driver Audio: Realtek* ALC Audio Driver( Audio: Realtek* ALC Audio Driver) from the site but it did not help

Hmm....
Did you also check for the latest chipset and BIOS updates?

how would a bios update help in solving audio problem,in any case i am downloading and lets see if it works and is it not possible that in some setting inside the computer or through the windows it is set that way i mean the volume settings.

but when i play fifa 09 in that sound is ok but when i try to wtach any movie in that sound is really poor

It's probably .ac3 audio.

Install ffdshow.

have already installed k lite mega codec pack