As Bob said (somewhere in there... ):
 
Edit > Preferences > Audio > Driver Settings > ASIO Control Panel button.
 
Try setting buffer at 128 samples to start. This will significantly reduce input monitoring latency and give you snappier transport performance if nothing else.

Hi Bob
 
Thanks for explaining that.  I Didn't know you could access the interface settings like that. Sample rate is 44.1 asio buffer is 256.
 
Ive had a good look at your settings and now you've explained where to find everything im going to experiment with changes. Thanks for your help and explaining clearly. I#ll let you know how I get on.
 
Much Appreciated
 
LB

RTL of 28.9ms is very high for a 256-sample buffer. The buffers themselves would only account for 512/44.1 = 11.6ms of the total, and a good USB interface shouldn't add more than 3-4 ms to that. That suggests a lot of hidden latency somewhere - maybe an issue with your USB hub/drivers. You might try removing some other USB devices and/or moving the QuadCapture to a different port.

Well, let's see how the 128 setting works.
 
There could well be one or more things running that could be contributing to dropout issues.  A BIG culprit is a Wi-Fi adapter, and other causes include things like the extra software they give you when you buy a pre-loaded computer from the store, or sometimes an antivirus program, etc....
 
So, if changing to 128 doesn't make things better, download and run either or both of the following 2 programs, and run it for a few minutes, or if you downloaded both, run each one 1 at a time for a few minutes:
 
1.  DPC Latency Check (note, this does not report accurate times in Win 8, but does in Win 7).  This can be downloaded from: 
 
http://www.thesycon.de/deu/latency_check.shtml
 
2.  LatencyMON - works good in both Win 7 and Win 8, and can be downloaded from:
 
http://www.resplendence.com/latencymon
 
The above programs will gather data on your system's basic ability to handle audio streaming tasks, such as what Sonar does.  You would download and run either for a few minutes.  DPC Latency Checker tells you right away if things are OK or a problem, and for LatencyMon, you View Report (might be results, can't remember which).
 
 
Bob Bone