OK, so the original sound file gets changed, both the computer file itself, and, of course, how it sounds when its played.
Now, on your computer, is the sound file itself changed, or is it just how it sounds when its played back on your computer that is changed?
ETA: or maybe you don't know if the sound file itself has changed, you just play it and hear the changes.
The sound file itself changed on both laptops, mine, and the laptop in Nottingham belonging to Mr Roberts.