audio delay

hay guys,in experiencing audio sync delay on some,not all but some channels,some channels are worse dan others and some are totally unwatchable,i always had a tiny delay ,never really too noticable but its recently gettin worse,i thought about using the audio sync setup but dont want to upset the hole lot so just wondering does reconfiguring effect all channels or just the one u want,as i said some channels are fine so afraid if i change on a delayed channel will it change the rest,thanks miltownman

sorry usin vuduo on vix 2.1,wud rather not change if possible