I'm not sure when my 360 started doing this. I half think that I probably installed something from the Mass Effect extras disc that makes this stupid beeping noise, but kinda doubt thats where it came from. But yeah, my 360 now makes this weird musical beeping noise that is barely audible, but much more audible when the volume is high. Today I was watching a dvd, and during the quiet scenes I could just hear the weird musical beeping. What the **** is it?