Songs on my new iPod don't play properly. What's should I do??

[kkaja1]

I got a new iPod on Sunday, and i put some of my songs on it (I had to convert them into AAC from MP3) and then everything was OK. But when i put some more songs on the songs go all weird - the voice is quieter than the background music or it has some weird noises. What's wrong and what should i do?

[Codey L]

it might not even be ur Ipod same thing happened to mine
then i realiezed it was the head phones