Hi Jeff, We recently did a group study on environmental sounds in the ChucK forum. There was wind, rain, and thunder plus ocean and birds. I'd suggest cruising on over to the ChucK forum and looking for a fairly recent topic in the listings, perhaps within the most recent few pages. Good Luck, and post again or to the forum if you can't find it - it *is* there! Les Hall (Inventor) http://www.freedomodds.com/music/