Step 1How to correct for the influence of the measurement system?
In some cases it is important to be able to correct for the influence of the measurement system, e.g. when the exact phase is desired. How to correct for the influence of the sound card will now be described, if you want to include more e.g. an amplifier in the correction, the procedure is similar. If you use the sound card VXpocket (or VX222) calibration files have already been made, and you may use the existing files instead of measuring your own. Then you can go directly to the last part of step 2 below.