This is basically just an issue I've had to deal with for awhile now, so I figured I'd post it here. In fact, I probably have mentioned it somewhere. In short, anytime I find myself rounding a corner as an alien into the human base, such as in ATCS or Niveus (when humans have managed to move to the window room_, my system renders all of the sounds and images (alien radar, humans etc.) at once and a i get a huge lag spike. During the spike I sometimes can actually freeze for a second or 2 and I've noticed lots of yellow at the top of my lagometer.
To add to the frustration, this hasnt always been a problem, when I first installed tremulous, I would never experience any lag spikes. Anyways, if anyone has had this problem or has any recommendations, feel free to post.
I'll post my sound config and specs later on.