I just added a newly revised peacefulbrook demo jar.
The main difference is that there is now a campfire. I wanted to show an example of a fire that would go on endlessly without looping. For example (with a bit of modification or a different sample): a torch on a wall in a 3D game.
The recording consists of 5 seconds lifted from a free sound effect, and processed a bit in Audacity. The effect could probably be just as effective with a couple fewer seconds in length, which would have shaved off several hundred KB. As it stands, the file is 2.7MB now, with just about all of it coming from the stream and the fire recording.
With more stuff happening at the same time, the volume controls take a bit more tweaking to get a nice mix. My wife thought the fire was a bit low, and when I turned it up, like the frogs were in the fire. So, consider bumping the fire up a tad, and putting the frogs more in the distance (lowering the volume).