I had lots of issues with MIDI/latency/USB/audio interface. This is something I wrote at Keyboard blog. LatencyMon utility was able to pinpoint my issues. I'm now very happy my VST/PC.
I came here to get help fixing my pops/cracks/latency issues I've been experiencing with my VST - Free Kontakt Player using Galaxy Vintage D VST.
Considering I assumed that most people who responded have been there before and have insight into my issues I must say that using a USB interface does work fine. My cheap interface was fine. It's the NI Traktor Audio 2. It's sold as a Virtual DJ interface but it works fine for my application.
Here's where I must say that I found other blogs who really helped me pinpoint the tools I needed to figure out my issues which were how my computer automated it processes and used valuable CPU resources.
Now it's my turn to give out information that I hope will help anyone in a similar situation.
These two utilities is where you start.http://download.cnet.com/LatencyMon/3000-2086_4-75300293.htmlhttp://www.thesycon.de/deu/latency_check.shtml
The most important one is LatencyMon. I couldn't download at their site but the link I posted will work.
This program gives you the information to tweak your computer for those processes that are stealing your resources.
Before I used these I went to the manufacturer of my computer and updated everything I could - BIOS, drivers, etc.
After I ran LantencyMon I realized the biggest user was my NVidia driver for my dedicated video card. As it turns out there are some issues with latest driver so I rolled back latest update to a previous version and turned off some of its quality controls. Since I'm not playing video games I don't even notice the changes. I also disabled the ACPI battery control in device manager.
That's all it took to fine tune my computer. I didn't have to even turn off wireless, internal speakers or other devices. Those two tweaks allows me to run 64 samples and 1ms USB buffer with a latency of 5.4ms. I probably can go even lower but haven't tried yet.
I hope this helps anyone avoid all the time it took me researching and trying different combinations.
Lastly here's my shout out to Galaxy Vintage D and Neo Soul Keys for giving me some great updates to my live gigging gear. I run this from my FP4. I run computer to input of piano which allows me to use internal speakers as well as my stereo GK system.
I hope all this works at next gig. I am hoping for the best.