[Electronic Music] [Berio, Luciano. (1925–2003) & Ligeti, György. (1923–2006) & Ussachevsky, Vladimir. (1911–1990) & Takemitsu, Toru. (1930–1996) & Belson, Jordan. (1926–2001) & Maderna, Bruno. (1920–1973) & Ferrari, Luc. (1929–2005) & Badings, Henk. (190Original program from the fifth of the experimental electronic music "Vortex" concerts, dated January 12 27 [1959], with works by Berio, Ligeti, Ussachevsky, Takemitsu, and others. The series of concerts took place from 1957 to 1959 in the Morrison Planetarium in San Francisco "to explore the esthetic possibilities of technological developments in auditory and visual media," and featured elaborate lighting and visual effects directed by Jordan Belson,