Very timely post!
My video card is shared memory and I am not having issues with virtualizer. I just got my nanopad yesterday and gave it a real workout today. I don't think the delays are related to your video card. It's LSP. Although setting it up went fairly straightforward I don't like the results with the nanopad at all! Very laggy and sluggish. I've played music most of my life so it's not me. Something's not right.
I has stellar results using vixen's keyboard mapping music method. This was 90% done with that method: You are not allowed to view links.
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LoginNow using mouse tap mode with good results. Debating on returning the nanopad...