Audio pioneer Ray Dolby, founder of Dolby Laboratories, has died at his home in San Francisco. His company says he had been suffering from Alzheimer’s disease and was diagnosed with leukemia in July. He was 80. Dolby pioneered technologies in noise reduction and surround sound that are widely used today by theater owners, consumer electronics companies and content makers. His namesake Dolby Theatre at Hollywood & Highland is home to the Academy Awards. Dolby took over ownership of the former Kodak Theatre on May 1, 2012, the same day the Academy signed a deal with property owner CIM that would keep the awards show at that venue for the next 20 years. He has won several Emmys, a Grammy and the National Medal of Technology from President Clinton for his work.