I know I've discussed this about a year ago, and I believe I did get some answers that worked. However, a year later I am playing GS-1 again, and--though I saved the replies--I still can't get GS-1 to work without a significant delay (?latency) from when I hit the note and then hear it. Of course, it's only a fraction of a second, but still very easy to hear.
I know I saw something about buffers in  the past, but, at least in the page that I was able to adjust, bringing buffers down from 256 to 64 did not help. Also, they rec'ed disabling certain plug in's, but I'm somewhat embarrassed to say I don't know how to disable plugins. I could look it up, but I'm hoping that I can do something else with the buffers instead.
I have Sonar X-3, with a Dell I5 with about 6 GB RAM. I am using ASIO drivers. I can get some more details if needed.
Thanks.
LNovik

Are you talking about AAS' Strum GS-2? Or what? Clueless here, and not even in Seattle.

Very sorry. It is AAS Strum GS-2. IN fact, I paid extra to get the more complete version that has all the sounds. I don't think I'd need any updgraded version, since I just downloaded it yesterday, staight from a salesperson at the company.
LNovik

If you bypass all effects (Press "FX" button in the MIX module), do you still get the latency?  If doing this makes the latency go away, then one of your effects is introducing latency (maybe a linear phase EQ, for example).

Thanks. I'll try this tonite after work.
LNovik

Could try the PDC button  near the FX button in the Mix module http://www.cakewalk.com/Documentation?product=SONAR%20X3&language=3&help=Recording.23.html
 

I DID turn off the Fx on the mixing panel, but that did not help. I'l try the PDC button tomorrow. However, I did stumble upon a solution--at least  one that removes any noticable lateny. Under "edit," I  hit preferences. When I got  to that screen, under the Audio section, I chose Driver Settings. I then clicked on  the ASIO panelsmall rectangle, which took me to another screen. There, I found the ASIO Default Buffer size. I changed it from 1024 to 64 and the latency completely disappeared.
I don't know what this  change will do to the rest of my trying to run Sonar, but at least I've conquered this 1 small problem. Thanks for the support.  Tomorrow, I will also try to hit that PDS button and see if that makes a difference without changing this other item. 
LNovik

If the FX button makes no difference the PDC button won't either, they are both related to plug-in induced latency, Running with ASIO buffers set to 1024 will create considerable delay when trying to monitor a softsynth while recording. If you can run ASIO at 64 buffers that is your solution. You can probably get away with 128 buffers if 64 is too low for the DAW to run reliably.

good detective work, LEN... You'll learn to shrink the ASIO buffer for tracking (playing to what you've done, where you want to minimize latency) and expand it for the best playback/mixing where tracking isn't important...
 
Try the lowest buffer size that doesn't introduce artifacts/distortion/yuck... as your mix gets more complex/cpu intensive you'll have to increase the buffer... which increases latency.

On my system, I can record at 128 without trouble, so haven't felt the need to drop to 64. But when mixing, I raise it to 1024 to reduce CPU load and save it for the plugins.