Juan Hidalgo Codorniu (14 October 1927 – 26 February 2018[1]) was a Spanish composer, poet, an action and visual artist.
In 1958 Juan Hidalgo met the Darmstadt American composers John Cage and David Tudor who were crucial to his musical and career development.
In 1964 he founded the ZAJ group along with Walter Marchetti, Ramón Barce, and was later joined by Esther Ferrer and the writer José Luis Castillejo.
In 1966 he participated alongside Gustav Metzger, Otto Muehl, Wolf Vostell, Hermann Nitsch and others in the Destruction in Art Symposium (DIAS) in London.
The people on board would hear the train's very noises enriched by an additional mix of local music and sounds, giving an audio-portrait of each stop.