I used the mother board's onboard audio. What you need is both a line in and a line out. Mic in dosn't work.

Most people use it for bass, but with a better microphone, you can measure the full range.

If you are interested, read through the REW and calibration forums. Make sure to read the REW FAQs more than once. Everything you need to get you going is in there.

Fred

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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!