When I use my JB3 as an MP3 player it tends to freeze and make a loud buzzing sound through the headphones after some time when I have it on and am listening to music. Any ideas on what could be causing this? It seems like it only happens when it's running on the battery and not A/C. Could it be the hard disk or firmware? If it's the firmware would I be able to fix it without having to reinstall all the music again? Thanks in advance for any help I can get!