A few months back, I have raised some comments regarding the mixer settings found in the main GS screen. Sadly, the new 1.60 version doesnt\' correct a fundamental flaw.
What is that problem? If you try saving perfomance patches after adjusting your mixer sliders (say to the middle, value = 64), the problem arises when you reload the performance patch; The slider will be located in the middle but the volume will in actual be playing at 127.
I have thus conclude that the mixer serves no useful purpose at all.