Gottfried Michael Koenig (b. 1926) is a seminal figure in the history of electronic music. He contributed important technical and musical ideas at WDR studio in Cologne from 1954 to 1964. He was then the director of the Institute of Sonology in Utrecht, Netherlands until 1986. Since 1986, Koenig has continued to compose, to develop complex computer systems, and to edit, translate, and publish his extensive corpus of theoretical writings.1 This conversation, which aims to foster further English-language scholarship on Koenig and his music,2 took place in English in May 2015 at the Institute of Sonology, now located in The Hague, Netherlands.