At the advise of Software Update, I have just downloaded and installed 8.1.1, and now all my songs sound very strange. Some seem to have a loud instrumental while singing sounds like it's coming from across the street. Some songs sound like they're under water. Some songs sound like they're being played in a pipe or a tunnel, sort of echo, or have an unrealistic effect to them. Some are just plain utterly soft even with all volume settings at maximum. I really can't listen to my music like this. I've gone through all the settings and tried everything I can think of. I regret upgrading. It was fine before. Seems like this happened a few years ago also, or did I dream it?