This fellow makes the rounds of RenFairs and such. I’ve heard him many times and have a couple of his CDs. In the vid yo can see how he operates the machine. And it’s small enough you can see how the whole thing works. It’s permanently built on a small flatbed trailer. Sometimes he plays in parades which is here I first saw/heard him rolling down the street. Interesting chap to talk to too. Cast in Bronze - Carol of the Bells - YouTube