I found this linked up from the Lounge forum on Ars Technica: a lady plays popular movie soundtracks on her Yamaha Electone electric organ. I wasn’t sure what I expected, but I was blown away by the performance.
The lady performs all of the major parts of the orchestra by herself simultaneously using the Electone. By what I can tell she doesn’t have any part of the score pre-programmed into the machine. There are times in the video where she adjusts some settings, but I don’t think that makes her job any easier.
I searched for “star wars electone” on found more videos, so if you like this one give the others a try.