Audio problem, with *.Mov files ########

hiya.
ive got some mov’s which when i try to play, in every single media player. i have them all. the audio is like a chewed up cassette. all echoey and horrible.
i thought i could be a clash of apps, so i got rid of real player. but still same problem continues.

someone plz help. @!! please dont ignore this like you have my other posts

thanking you in advance CompB

peace