I've been exploring some of the physical models in the user library. I really like Chet Singer's Serenade. It is not easy to play, but makes many interesting sounds--some of them very realistic. Please find attached an mp3 (inside zip file) of some recent success. I don't think it sounds like a real acoustic bass--it has a filtered, digital feel. Yet, I really like the results! Anyone else exploring these instruments right now?