Eienaru

Hi everyone, I've looked around for a fix for this for a while now but all I find is things directly relating to music players.. My problem is with every sound on my phone, it becomes a total mute just randomly. None of the apps make any sound, none of my music works (I get an error message on any media player saying 'this device does not support this audio file'), even the little touch tones don't work. Rebooting usually works for an hour or so before it does it again, and sometimes I'll even ignore it and it seems to fix itself.

This morning for example, I woke up to a different alarm and watched my phone because I knew it would be going off soon as well. The alarm screen came up, no sound. I checked the volume settings, nothing was set on silent. The tone for the alarm was one of the preset ones on the phone. I had even rebooted my phone the previous night and hadn't touched it since. I picked up my phone maybe an hour later and found it to be working perfectly fine after I hadn't bothered to try to fix it after seeing it's alarm fail.

Any help? I'm really confused with my bipolar phone.