For what it's worth, on a whim I peeked inside my Neverwinter Nights 2 folder, and found thousands of .wav viles that I could plunk right in Softrope and build some great scenes. Some are in a folder called Ambient and can be used and looped without any work at all. Others are in /Data as a zip file called Sounds.zip; unzip it and you've got literally thousands of sounds to work with. Of course I wouldn't want to encourage anyone to use these sounds to do something commercial, but if, like me, you own the software legitimately and you're just building sound-portraits for your weekly gaming session, this is an easy way to get source material.
Love the program, btw! Can't wait to see it grow.