this advice may be useful:
since you say its the same for google & youtube.... i dont think this is a flash thing... this is a either fucked up computer or fucked up speaker thing OR soundcard
1) i'd suggest trying ur speakers on another computer, to really see if its them 1st though... because itd be easier than replaceing a damn card
2) fucked up soundcard. maybe his soundcard inside the computer is screwed up. misplaced a bit, or broken.
and salad fingers is my hero. i even have the lime green shirt. its quality is genuine.
thats why iv'e bother with this to be honest