As Engadget writes:
It’s a tragic time for both music and technology. Ikutaro Kakehashi, best known as the founder of Roland Corporation, has died at 87. The engineer turned corporate leader got his start making electronic drums and rhythm pattern generators, but it was after he founded Roland in 1972 that he hit the big time. His company quickly became synonymous with electronic music effects, and the machines built under his watch didn’t just become popular — they changed the cultural landscape.
It’s safe to say that digital sound as we know it today would not have been the same without Kakehashi.