Hello!
There is one sound bug, where the main engine sounds are not played. It seems that the sound is composed out of several sound tracks (or triggered by different tasks). The main engine sounds are not played, while the situation-depended sound (boost (<W>)) is still played. This bug can be reproduced by 1st getting killed by the end of one battle, 2nd leaving the battle, before it is over and 3rd joining the next battle. If the bug occurs only a restart of the game client can solve this. With the bug the sound is very "flat" and quiet. The "space" of the sound is missing.
There is another sound bug, where almost no sound is played - only gun hit markers are partially played. This bug hits in the middle of the battle. The sound may even come back.
Ralf