Just listening to my library and I 'think' I noticed some songs that I has ripped a while ago sounding kinda crappy, like a bed rip. I cant rememebr if they were like that since the day I ripped them or was wondering if songs will decay after a while. I would have though that the mp3 would have a checksum so that the player can tell if it is bad or not. Any ideas on this? Do songs decay over time?