This requires details. Are you talking about original Marathon, or M1A1? What operating system? Did you recently change anything, like switching to a newer version of QuickTime or Aleph One? Do the music files themselves sound fine if you play them with another program?
: Hello..
: I have a problem.. the background music of Marathon doesnt play right
: anymore.. it sounds horrible,but it did play good before..
: Does someone knows how to fix it?
: I tried with the options already but it didnt help that much..