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problem with 5.1 speakers!

Very frustrating...

Just bought Logitech Z-640 speakers and plugged them into the onboard sound (Soundstorm by Nvidia) which is rated for surround sound 5.1 and at first could not get rear or center speakers to work. Nvidia has a test program to test surround sound and everything came out of two front speakers.

Trust me...I have triple checked all wire connections. I have also checked speaker settings in XP (set to 5.1). I have tried every option in the Nvidia audio control panel software as well. Something I just tried was to uncheck the surround sound analog encoding option and guess what...the rear speakers now work but not the center.

I know the center speaker works because of the matrix option on the speakers which routes right and left channels through center. I can do that but can't get the center channel to come through!

Anyone offer any advice on this problem?
 
Which Mobo?...In order to utilize the Rear and Center Channel to work I believe some MoBo's require the use of the Mic and Input jacks to be used...On my Abit there is 2 seperate plugs above the Front to be utilized which is confusing because next to the front jacks are the Mic and input plugins
 
I have an Asus A7N8X Deluxe nforce2 with onboard surround sound capable audio. The connections are color coded so you can't really go wrong with that. They seem to match from what both manuals say.

bump for some more advice?
 
Go to NVida and download the new drivers as ASUS wasn't support by them in the past so they had their own
 
Are the sound driver settings/windows speaker settings, set up for 5.1 sound?
If not, then theres your problem.
 
I have the same board and problem and called Asus and they told me what the problem was. I needed to plug the center speaker into the output channel and the rear speakers into the mic channel and it worked. Now silly me for not thinking of plugging my speakers into the mic channel! You're only supposed to plug the rear speakers into the rear speakers channel when you have a mic plugged in.

Just one little hiccup in an otherwise great board.
 
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