Funny that rain is part of the sounds :D. As an italian I'd never thought about adding it.
Btw it's sounds amazing, but the sounds are a bit short in length and you can "feel" the repeating loop.
After listening for a while, I came back to say exactly this. It's certainly much more work, but I think worthwhile for people want to spend a length of time with it on. Perhaps 10 minutes plus. Also, make the durations of each track different lengths so they cycle asynchronously.
This was my exact problem with the last implementation of this posted on HN. The “bartender” track asked “want another one?” Roughly once a minute. Thunder cracked on a short cycle in the rain loop. Just too many identifying marks. And after I spotted those pattern sounds I couldn’t not hear them.
