Thanks to Yerz for pointing out an interesting thread over on the Peters forum. If you follow this link it'll take you to a discussion on sound on the Sprinter. And more interestingly, on the possibility of General Sound support for the system. The thread's getting quite long, so I'll quickly mention that Peters will soon be putting up a poll about the "extended sound of the Sprinter." So if you're interested in this topic, keep an eye on the page, and you could influence what could be the next real Z80 demo-platform.