How to perform “Total Calibration”?How to perform calibration of absolute output level?
To calibrate the output of the measurement system is very similar to calibrating the input. If you choose to use the sound card input to measure the levels during the output calibration, it is required that the input is calibrated first. Therefore we strongly recommend that you do the input calibration before doing the output calibration.
Make sure that the input and output volume is not so high that it gives clipping of the input signal or so low that the calibration gets unreliable.
Note that if you are using the VXPocket or VX222, there is a special gain setting in the sound card mixer under Advanced Input that can be used to switch the input from Line to Microphone (see the Tested Sound Cards file).
First determine if you are going to do total calibration or detailed calibration.