Charles Cohen (1945-2017) was a Philadelphia, Pennsylvania area-based free jazz musician and composer. Creating music since 1971, his music was entirely improvisational and produced solely on a vintage Buchla Music Easel synthesizer, an extremely rare integrated analog performance instrument made by synthesizer pioneer Don Buchla. He has been increasingly recognized for his artistry performing internationally and was one of a handful of musicians who has mastered the Buchla Music Easel, an extremely rare instrument. Only twenty-five of the instruments were produced in the early 1970s and only a few have survived. He was also considered a pioneer in synthesizers and performance music. In 2011, Cohen was named a Pew Fellow by the Pew Center for Arts & Heritage for his contributions to improv