You are plugging it into a soundcard directly?

I use a little Sony ICD-ST25 recorder, then transfer that to the computer via USB and the program that came with it. The data compression is pretty heavy, but in the context of speach I can't hear it. I like this because I can plug the Radio Shack interface into a cordless phone and get away someplace quiet, away from the computer noise and my screaming kids. You plug the Radio Shack interface into the handset jack on the phone, then plug the headset into the interface and the output of the interface into the little ICD recorder. My headset is a decent Plantronics one, and the mic on that sounds surprisingly good. That is what records my voice. It works great and sounds exactly like it should.