Windows 7 All microphones output only static

[Blaster Bob]

My laptop has two built-in microphones and I have a USB sound card with two microphones built into it. Both recording devices show up in software but if I try to use either of them they output high pitched static for a few seconds and then go completely silent. The right channel always cuts out first. If I click on the "Recording" tab in the Sound dialog CPU usage maxes out and the box freezes until I kill it with the task manager.

I have a Fujitsu Lifebook T4210. T2500 2.0 GHz Core Duo, 2 GB RAM, SigmaTel Audio (using latest vista drivers, no 7 drivers available). The USB sound adapter is a Turtle Beach Audio Advantage SRM.

Thanks for any help.

Edit: Also, everything works right if I boot into XP, so it's not the hardware.

 

[reghakr]

I'm wondering if you have the codec installed also try [SigmaTel High Definition Audio CODEC 6.10.0.5609

 

[Blaster Bob]

I have Sigmatel V6.10.5866.0, which would appear to be a newer version.

And that wouldn't explain the USB card not working anyway.

Edit: Tried to install that driver anyway. Get an error after unzipping.

 

[reghakr]

Do you happen to know the manufacturer and date of the driver for the Turtle Beach Audio Advantage SRM?

I'm asking about the manufacturer to see if it's using a generic Microsoft driver.