Hi,
I have only Minecraft here as an java programm and there´s no problem with sound, anyway here´s the output:
$ mc
asdf
27 achievements
208 recipes
Setting user: tobi1953, 8894975074506846389
LWJGL Version: 2.8.3
OptiFine_1.4.2_HD_U_A6
Tue Nov 06 19:20:40 CET 2012
OS: Linux (i386)...