I only just found out about this thing. It's considered by some to be the word's very first synthesizer, from 1939. It's fully polyphonic and it sound incredible! It has 146 tubes in it! My favorite sounds in the video happen at 1:25 and 4:20. It almost has a vocal quality about it. I also like when the guys are talking about how simple the design is on the outside but how complex it is on the inside, then one of them says something along the lines of "It's like a swan, gliding gracefully across the water, but below the surface it's paddling like crazy."