Quadraphonic sound used two front and two rear speakers, and several formats were developed. Recordings on vinyl records could also be played on standard stereo turntables; however, one technique ...

Four musicians performing in a quadraphonic sound setting will explore themes of the doppelganger through electronic ...

Nov. 9----Bolinas resident and pioneering electronic musician Suzanne Ciani performs in quadraphonic sound at 8 p.m. Saturday at the 4 Star Theater at 2200 Clement St. in San Francisco.