:'(I have 183 mp3 files on Win 7 hard drive. I purchased a Sony CFD-S50 boom BOX that plays MP3 files. I have used Nero 9 with Data CD selected for o/p. The first few files (about 12) played fine then started hearing a pop then in next song(s) pop, pause, bubbling sound, pop, pause, etc... this continued to next several songs till I got fed up and ejected the cd. So I tried using WIN7 Explorer and 'send to' my DVD/CD burner... played in boom box and got 2nd song 1st and then pauses. I'm very frustrated and don't KNOW what to try next. I thought maybe the boom box was faulty but played these o/p cds on the computer and got the same bad results as the boom box. I played the original MP3 files to make sure they were good and they were good. Any help WOULD be appreciated. I did a search for this topic and found one that turned into a wrestling match and the topic was closed.Your burner is failing...That is a good possibility but,  I've recently done back up of videos and pictures and the o/p is all OK. Hmmmm!The only other suspect then would be the media...try a different brand of CD/DVD's...Thank you HACKER, that seemed to be the problem. I used a Memorex and it's playing beautifully.