I've had some sound problems in MX-15 with VLC and Trinity. The issue is solved... sort of. This is a link to the discussion: http://forum.mepiscommunity.org/viewtopic.php?f=100&t=40197 The short version is: After I installed KDE Plasma Desktop, the problems cleared up. Recently, they started again. If I log out of TDE, log into Plasma Desktop, log out of Plasma, then back into TDE, I have sound again in VLC.