Change the SB X-FI synth A to the MS GS synth, or something close.
Even though it is not being used, this has helped some ... not sure if it'll help there.

The 2000 MS buffer is 2 seconds. Often it is given in samples, as opposed to MS.
Try changing that to 50, then if it improves work your way down to an acceptable level and set it there. Don't keep going until it starts stuttering; there will be a zone where the latency is acceptable, and system can keep up comfortably.
Often that number ends up at 5-10 ms for some folks. Depends on how fast the system is.


I do not work here, but the benefits are still awesome
Make your sound your own!