Seen on U&I Software’s Twitter feed: the best overall description I’ve ever seen of exactly what Metasynth is and does:

“Metasynth uses a totally unique method to produce sound and I can’t think of anything that comes close to it in originality and creative depth.”

Well worth a look if you don’t know Metasynth and have ever wondered what the big deal was. It really is an amazing bit of software.