not 'beeps' so much as either Pulse-position modulation or FM to control the positions. I had a 'beta test' teddy before they were released, a friend of my father was a sculptor at WoW. I guess little me didn't want to give it back but had to, my Mom had to fight hard to find one at Christmas with a little inside info on delivery dates. You can still make cool stuff for your own sake, you don't have to monetize every hobby.