By the sounds of it you're using pre-os9 right? Please let us know! For osx, iTunes is very easy to enable support for LW. For os9 the support is limited. By the way QT has a limited ability to play mp3's (keeping in mind there's many different kinds of mp3 out there.) You really need a dedicated mp3 player. The one that plays the most types of mp3 on the mac platform is Audion (google Audion) & there's versions for OS 8-X. It's shareware! But it even does better than iTunes by playing more formats (see the comparisons at the website.)