Has anyone ever heard of someone having mp3s frequently develop glitches? This has been happening to me for over 10 years now. I back up my mp3s once every couple of years so I can often go to a backup and replace the corrupted mp3 but if its an mp3 I've downloaded in the past year or so I have to replace it. The mp3s still play but they develop loud blips or sometimes develop skips where a second or so of sound will repeat and replace the second that was supposed to follow. This problem has followed me across many hard drives and operating systems. I've never had any data loss or corruption of executables or other media types, only mp3s.
Usually the glitches are very small, most people wouldn't even notice, but I know they weren't always there because when I go back to a backup of the same file the glitch is not there.
I've always had up to date antivirus. I don't understand how this problem could follow me across so many systems.