Okay this is bugging me. Do old AC/DC songs use something other than A440 tuning? I ask becuase there's songs that I know I have the right chords down, like highway to hell, but they just sound....off. Like not really a half stop down but somewhere inbetween. Its weird. I noticed this with other older songs like let there be rock too. What I am doing wrong and/or anyone know what they're tuning to? My guitar is in tune and intonated. I don't like sound...off!