Well, that all sounds over my head! I work with sound (meaning I listen for a living, not that I know anything about sound files!) and whenever I can't hear dictations the first thing I do is check YouTube or one of thousands of music files I have. If I can hear them, I need to reboot. If I can't hear them either, it's user error, LOL. Like my headphones aren't plugged in, or I muted my sound, or something stupid like that 
