Adjusting sliders in DAX

Only had my 6400 a week and still learning, I have fl digi working, I was used to adjusting alc on 590 but wonder if I have too much or maybe too little using Dax. See in instructions that sliders should be less than 0, so as close to 0 is ok? Also on audio to fl digi have sliders all way over too right and don’t see the typical blue waterfall in fl digi, see signals, trying to make sure I have alc and audio to program set right, thanks for reading and any input.