Let me ask a 'dumb' question here... do the songs (.sgu/mp3/wav) sound 'better' coming from the laptop into the PA, as opposed to the files being played thru a CD/mp3 player?

Also, on the computer, why do the songs sound so much better via Windows Media Player than thru BIAB or Winamp?

Just trying to get the 'best' sound out of all the hard work I put into my BIAB arrangements...

THANKS!