I'm guessing that yours too is a motherboard soundchip, and you tried the ASIO4ALL workaround mentioned earlier.
First thing - do send an e-mail to the developers if you haven't already - if your soundcard works fine with other music software, then the SM guys have a bug that needs fixing. You may not have the best soundcard in the world, but DS is supposed to be a standard that works with everything, and you should not be getting crashes!
Yes it''s a motherboard soundchip. I have an ASIO driver on the system but I thought I check for a solution here before I go poking around. I've noticed I'm far from the first to experience this. As I said, I was just trying to kick the tires and I liked a lot of what I saw but when the software barfs on it's own demo it makes one suspicious - why wouldn't it?
I was hoping for an answer that goes something like, "yes we've seen that problem, it's because of _______ and you need to do _____, sorry about that." In other words, something reasonable. I'm also thinking that it should be self evident why a demo ought to work on a basic system.
I did download synthedit after maker failed and it worked fine. My first impression was that it's not as slick as synthmaker which is why I tried synthmaker first. On the other hand, it does have a rather nice property of working right out of the box.
My advice, fix your demo.