By the way, I checked out the site below but didn’t really understand what they were saying. Apparently, I’m not the only person looking for a way to switch the left-right stereo channels.
Well, switching left and right channels is a bit different than what I understood you describing up above... but... if this is the problem (only that...) — then you can test it out rather easily and see if it works.
Just plug in some earbuds and switch the left and right earbuds and see if it “sounds all right” after you do that.
If it sounds all right and everything is corrected — then that’s obviously your problem, and then you can seek out a software solution to your problem of the left and right channels being reversed.
I sorta doubt that’s the problem, but the “sure-fire” method for testing it out — is — simply to switch your earbuds and see if it sounds okay... [no really... that will tell you... LOL...]