iTunes 7.2 has an odd bug that affects importing certain MP3 files. Here's the workaround. iTunes 7.2 has an odd bug that affects importing certain MP3 files. Here's the workaround. HOW DO DIGITAL WORKOUTS WORK? Personal trainers record audio or video of their workout instructions and make them available through a Web site. Exercisers pay a fee to download the MP3s or videos to their iPods or other MP3 player, or burn them to a CD.