http://forum.xda-developers.com – I don't know why this started but it is very annoying. My speaker works because I played music while my phone didn't make any noise and it worked. But when pressing the volume keys, the little "boop" doesn't sound and when I restart the phone, the animation and sound turning off doesn't sound but the boot animation sound works and everything is normal, at least for awhile anyway. (HowTos)