Alright,i'm recording in sonar and am trying to record the next riff(on a track below the previous riff)and once I complete the riff,on playback there this "Woomph" sound on the first strum.I know it isn't because i'm picking it hard or anything.Its not clipping or anything either...I even tried strumming before the next riff enters and it still audible.There IS a lead line track directly above it...

I also sometimes get a "click" at the very start of a riff,even without splitting clips.Very strange.Why can't my daw simply work!

any help much appreciated.