Oh, you mean that the tracks that play during map exploration have that ambient noise (kind of like sound effects superimposed on the music)?
I understand what you mean; interestingly I never gave it a second thought. Probably because the first time I played through the first game was through an early CD-Rip that had no music at all, just ambient noises.
FWIW, the music that plays in the towns/castles and during battles, does not have that ambience added.