Editor’s Note (Kees Tazelaar) -- Autor’s Note -- Translator’s Note (Richard Barrett) -- Preface: Koenig’s Actuality (Horacio Vaggione) -- On Musical (Artistic) Inspiration (undated) -- Progressing in Stages (1999) -- Musica e Numero (2001) -- Interview with Ursula Stürzbecher (1971) -- Interview with Heinz-Klaus Metzger (1971) -- From Conversations on Webern (1973) -- Interview with Patrick Fleury (1988) -- Music and Number (1958, translated by Cornelius Cardew) -- Complex Sounds (1965, translated by Ruth Koenig) -- Serial and Electronic Methods in Electronic Music -- Bilthoven Course 1961/62 (1961) -- Notes on Musical Economy (1961) -- Genesis of Form in Technically Conditioned Environments (1986, translated by Ruth Koenig) -- The Word-Sound Problem (1961) -- Chance Decisions in Musical Composition (1968) -- My Experiences with Programmed Music (1975, translated by Ruth Koenig) -- Problems of Electronic Composition (1962) -- Condition – Instruction – Execution (1968, translated by Ruth Koenig) -- Some Observations on the Impact of Technology on Music (1982, translated by Ruth Koenig) -- Between Music and Technology: A Field of Tension (1990) -- Studium im Studio (1959, translated by Leo Black) -- Studio Technique (1954, translated Hans G Helms) -- Via Electronica (1960) -- Remarks on Compositional Theory (1968, translated by Ruth Koenig) -- Discography -- Index