Jokeyman, sorry I've been away from this discussion for a few days. Hey, that's great news. Glad I could contribute something to this forum. I'm in the Windows 10 environment and ran into the same problem with the missing MSVCR120.DLL. Found the download here, thanks to the Polyphone forum: https://www.microsoft.com/en-us/download/details.aspx?id=30679 Windows Elephant and Platypus similies...truer words rarely spoken. I am not that far away from you...near Reading, PA. My brother used to live in Port Jervis, across from Matamoras.
Ian B, that motion is seconded.
Finally, CYBERYOGI, thanks for the great suggestions regarding the Casio CT-660, 440, 460 and the Casio CSM-1/MSE-1. Had no idea those units were in the same basic family. My original MT-240 was a 1988 Christmas gift from Mom after I'd shown an interest in Jan Hammer. About 15 years later, its on board DC supply socket failed due to battery leakage that wrecked the board, so eventually I replaced it with a used one in 2008. At those times I knew almost nothing about MIDI keyboards and was too timid to attempt board level repairs requiring ironing. Additional thanks for the "Sausage Fingers" description. Could be my new nickname...HA HA, I am still laughing over that one!
For me, solution #1 is finding a used CT-660/440/460 and a CSM-1/MSE-1 for our real keyboard player and me. Solution #2 is I will learn PolyphoneNightPeople-SSongC10-Take2(remix122603).mp3.
Everyone, many, many, many thanks for very helpful information!!! Attached here is the original 1990 "demo" that started this quest. Try not to laugh too hard. The band says they want to record this thing with full instrumentation.