I want to use speakers that are hooked up the the s2721dgf monitor. I have them plugged into the audio line-out(6) port on the back. The audio adjustment seems to only affect the headphone port but not the back line-out. This isnt a problem for my computer as I can adjust it in the windows but for consoles like my switch and ps4, that isnt an option. Is there anyway to change adjust it for the back port?