How to perform relative calibration of mixer output levels?

The purpose of calibrating the output is to be able to obtain the true transfer function gain independent on the level of the WinMLS mixer output (relative calibration of mixer). The calibration can be done in different ways dependent on the features of the sound card (e.g if the sound card supports the WinMLS mixer or not) and the type of measurement you intend to perform. For some sound cards, e.g. VXPocket, a measurement setup file will be available with nominal calibration settings.

The procedure for calibrating the output mixer is equal to the procedure for calibrating the input mixer, so please follow the procedure How to perform relative calibration of mixer input levels?.