I found this interesting automatic musical instrument, making use
of programmed drones, that I thought may be of interest to the MMD
readers.  They play the Richard Strauss composition famously featured
in 2001: A Space Odyssey, as well as "Carol of the Bells" and "The
Star-Spangled Banner":  https://www.youtube.com/watch?v=Y0G2Kq9ypx4

Gary Rasmussen