[brucek]

As far as the measurement is concerned, be sure that the End Frequency is set properly in the Measurements routine. This is the sole reason why a Settings Check Levels and a Measurement Check Level are different.

I have to say that the last soundcard cal file looks more realisitic than the ones you've shown so far. The others show a perfect flat response down to 2Hz.. Must be an awful good card. The last soundcard cal file drops off as would be expected.

The upper frequencies of the last soundcard cal file is simply oscillating a bit. You may have the levels a bit high or possibly an effects turned on. Be sure the card is in Stereo only and no effects or soundfields..

brucek