I'm not wanting constant background noise and I find it ok that Sulani has less bg noise than Selvadorade which seems more lush and where sounds probably carry longer. But I miss the random sound at least from birds. I see some group of birds moving occasionally and find it strange that they leave no sound at all. It would also add to the tropical feeling if there was a tender sound, especially in night - I don't know if there are cicadas in this zone of the world, but something similar would be good. I read that cicada can be heard on a distance up to 800 meters, so it would only take one single, centrally positioned insect to fill Sulani, LOL! :)