Sound very low at full volume

I have an included XBMC on a Minix U-1, version 15.3 I believe. Recently, audio content on XBMC has become very low even when volume and amplification options are at maximum. This affects all content including system sounds. I downloaded and installed Krypton as a separate app and found the volume issues there as well.

No other Minix content seems to be affected. Volume levels are normal. I have been to most all areas where volume parameters can be altered. Am I missing something?