When you save the soundcard.cal file (as explained in the
REW HELP FILES) under Calibrating the soundcard, it will create a text file of the corrections for your card. I suspect the values up to about 2Khz are OK. I simply meant to edit it with Windows Notepad to remove the garbage above 2KHz or from where the garbage starts..
Attached is a small portion of my soundcard file. Look at it and see what I mean by it being text. Right button and Save target into your computer and then open it with Notepad. You'll see the correction values from 10Hz to about 1000Hz. The real file goes from 10Hz to 20KHz. If I had garbage from above 2Khz, I could simply remove the values above 2Khz if I wanted. This would make a usable cal file for you to use for low frequency work - your card only goes nuts above ~2KHz.
Make sense?
SoundCardCal.cal
brucek