Installing soundboard

I'm replacing a ceiling with some pine wood panels. I also want to soundproof it a little bit as the ceiling is comletely open to the floorboards above. The room above has painted floorboards, no other floor. The joists are also not level so I need to put in some strapping. Where in the layering should the soundboard go? If I put joists-->soundboard-->strapping->panels then there are 2 air gaps. If I put jpoists-->strapping-->soundboard-->panes then there is only 1 air gap.