Would you happen to know what kind of synth(s) Johnny Costa used on Mr. Roger's Neighborhood? I know he had an acoustic piano and a celesta on set, and played accordion sometimes, but can't find anything about the synth(s) he used for the flutey sound, or the Purple Panda segments. I would love to know because it highlights an intersection of 2 things I am highly interested in: Fred Rogers, and the history & evolution of synth technology. But I can't find the answer and that really bugs me.
try this: look at this image https://commons.wikimedia.org/wiki/File:Fred_Rogers_and_Johnny_Costa.jpg and look at the item on the top of the rack. notice the sliders, notice the white slider amongst the black sliders, and notice the text pattern underneath the sliders. then check out