I had this problem on the previous version of android and was hoping the recent KitKat update would fix it, but no. Every so often - and I haven't figured out what triggers it - the volume for "Music, video, games and other media" goes to zero - and it's impossible to turn it back up short of rebooting the phone. This is REALLY annoying, as it also affects voice prompts for navigation in Google Maps! Has anyone else had this problem - and most importantly, has anyone found a way to FIX this?
In case it matters - I'm running Android 4.4.2, build number KOT49H.L720VPUFNAE. If there's other info necessary to ID the problem, let me know.