Simple, and does what it says. No frills.. I dunno if it's even using my ASIO driver! BUT. it sure does what it says. I put it on my Desktop. Very quick and dirty. You can't record the output from this software. It don't record midi, but what it does is let you try out a VST quickly and see what it sounds like, rather than fire up your DAW. I like this little program a lot. I tried a few others, and like this one better. Very quick setup, and now you can check out your VST you just downloaded. Thank you for making this available, my hat's off.