Hi,
 
I'm experiencing minor latency playing software synths in Sonar X2 Producer (64bit) and wondered if anyone has any advice on how to improve it?
 
I have the Buffer Size set to Fast but not sure what else to do really.
 
Many thanks,
Chris

I am using the same version (W7), but have not noticed it. There are a lot of causes possible, starting with the driver that is used by Sonar.
I use the VS100 ASIO driver. In Preferences | Driver Settings I have checked the 64-bit Double Precision Engine.
Buffers in Playback Queue: 2
Buffer size: 5.8 msec 256 samples
 
The Asio reported Latencies are:
input     12.0 msec. 528 samples
Output   17.1 msec. 752 samples
Total Roundtrip: 29.0 msec. 1280 samples
 
Maybe this helps
Jan

Are you using any latency inducing plugins?

what audio interface do you have?

I run 24-bit recording at 48 K and an ASIO Buffer Size of 128 for recording/editing, and have around a 10 ms round-trip latency.
 
When I switch to mixing/mastering, I bump up my ASIO Buffer Size to either 1024 or 2048.
 
Your 29 MS total round trip latency seems quite high to be using while recording - what happens if you drop your ASIO Buffer Size down to 128?
 
Lastly, if you use certain plugins while recording, such as one of the convoluted reverbs, that can REALLY spike up your latency, so IF this is the case, you might consider swapping that out for some less consumptive effect - just until you finish the recording phase of the project.  Then, once you are ready to move onto mixing, jack up the ASIO Buffer Size, and then you CAN freely use things like a convoluted reverb.
 
Bob Bone
 

CDK,  we need more info about your setup.  Best would be to list your system specs in your signature (Look at ours for examples).