The author presents a four-part analysis of the role of electronic sound in contemporary opera:
- The clockwork voice: the important role of the telephone and the phonograph in the voice's mechanization.
- How composers realised virtual scenes using spatialisation techniques.
- The artificial voice: the synthesis of the voice.
- How to represent electroacoustic parts that are realised by electronic instruments or computer in real-time, in the score?
The author completes his article with a detailed list of electroacoustic music processes used in some contemporary operas.