Alt Sound Levels Turning on the Alternate Mixer function will enable the alternate mixer in place of the primary mixer and adjust volume levels to the settings in CVs 2.289-2.320. Turning off the alternate mixer function will enable the primary mixer in place of the alternate mixer and adjust volume levels to the settings in CVs 129-160 (Primary Mixer Volume Levels). Assign the Alternate Mixer function to a function key through the Function Map (unassigned by default)