somehow a music file started playing on my Mac and I can't get rid of it. Not from iTunes, Have tried rebooting and restarting browser. Can hear other sounds over it but not well. thought it might have come from an ecard or something. All have been trashed and trash emptied.
Try booting into safe mode and see what happens. It is at the end of this video:
http://www.youtube.com/watch?v=rFjR...You turn your computer off, press the power button, then hold down the 'Shift" key until the apple logo with a loading bar appears on screen.