Well, I've got the laptop and I've got the mic and the file explains how to compensate for the speed of sound and I found the freeware that the article mentions, so my investment so far is zero, but I guess the answer to my question is "No" so far. I might give it a try when the weather gets a little warmer, but I don't have a chrono, cheap or otherwise, to compare it to. At that price, I would be happy with +- 50'.
If you're a computer geek like me, as well as being a gun nut, the OP's idea is simply to make use of something we already have!
Which, if it turns out to be accurate, will be great. But then you'll need a chronograph to check it!
(really just trying to help you justify the Chrony)