How can I convert mp4 files to mp3? The ways I tried are totally unreliable. I've been using a website that sometimes works but seems to be down now. I also tried using Real Player but was getting killed by advertisements. I do not think it is possibe with Itunes, or at least I haven't figured it out, so maybe somebody can recommend some free software that I can download or enlighten me on how to do it with the software already on my Mac.