Ryo Kawasaki, the Japanese guitarist, composer, band leader and inventor of the guitar synthesizer, has died at the age of 73.Born in Tokyo in 1947 to a diplomat father and a multi-lingual mother, Kawasaki is remembered for his contribution to jazz fusion techniques and his pioneering work in the space where music meets technology.Kawasaki, whose name is synonymous with early music software tools, built the first ranges of guitar synths through partnerships with Korg and Roland Corporation, and