Imagine my excitement when I went to Ketron Italy site, found the software menu, found the SD3 (my unit) submenu, and lo and behold, found instructions for doing an SD3 software update. Step one says to download the executable file. Gee, surprise, there is no executable file to download on the SD3 update page. Since the SD5 uses the same sound engine, I checked there and it is not there either, although even if it were I wouldn't know if it were truly compatible with the SD3... It just keeps getting better and better!