Sigmatel Subwoofer Where Can I Get A 5.1 Audio Driver?

Where Can I Get A 5.1 Audio Driver? - sigmatel subwoofer

Hello, first time using Yahoo Answers, we hope someone can help. Let me briefly explain the problem.

I recently purchased the Logitech X-540 5.1-surround speakers. My computer has the necessary ports on the back side (green, orange, black), but can not the speakers 2 back to work.

The system is something called the matrix and make full use of surround sound capabilities. When activated, it works all 5 speakers and subwoofer very well, so it's not the connections.

I guess its not my sound drivers in 5.1 surround sound. I will try the information below is requested list.

My computer is a Dell XPS 710th
Under audio drivers in Device Manager:
Audio Codecs
Legacy Audio Drivers
SigmaTelHigh Definition Audio CODEC (think this is my sound card?)
Unimodem Half-Duplex Audio Device

I have tried to update all drivers, so I do not think that they are updated.

When can the audio driver, which is a problem, it's a website, an audio driver free download compatible with 5.1? If not, how much does it cost?

Sorry for the essay, I hope you can help.