battlefield bad company 2 sound problem

i searched the net for this problem...and i could not find a solution...the problem is i could not hear the in game dialogues.....i can hear everything else...the game sound...the game music....but when it comes to dialogues...i can see only the subtitles....
the things that i tried to fix this issue are:

*Go to MyDocuments/BFBC2/settings.ini - change the speaker count to 2(there was no line called speakercount for me...i had to include this line)
*reduce the hardware acceleration(i did hear the dialogues after doing this, but the whole game sound was like so scratchy)
*Go to MyDocuments/BFBC2/gamesettings.ini - change speakersize =1,2,3(none worked)
*updated my audio drivers

Anyone upto a solution for this.

My system specs

Intel asus motherboard - P5N73-AM(775 socket)
Inbuilt audio VIA HD Audio deck

I think the problem is with the version which is installed on the computer. Some files of the game must be missing on the computer due to which the dialogues are not audible on the computer. Try reinstalling the game and see if the dialogue's are audible.

i reinstalled it now and still i have the same problem....is it a problem in the game...or a problem in my pc....???

It seems that there is some issue with your game only i would recommend you to check it out on another system, i am sure you have to get a new cd or download the game from internet.

This game has the WORST audio of any of my over 200 games!

I think you have your AUDIO set to "home theater" which means DIALOG only come out of the center channel even when the charicter that is talking is behind you i still comes out of the center channel!
STUPID AUDIO
U need to set it for STEREO

What is even worse is you cannot tell where a weapon is being fired from????

My team mate is on my right and I hear his weapon fireing from my left!

I run 5.1 audio on home theater speakers! I,m used to games where you can tell where everything is around you Foot steps- weapons firing/ vehicals ....

THIS GAME SUCKS IN AUDIO! I might try it in stereo Just for LAUGHS!

THE WORST AUDIO OF ANY GAME!