In the tradition, surely inaugurated by Alvin Lucier, of making audible with the help of technological processes natural acoustic phenomena usually unnoticed into an ordinary ear is a whole school of electronic music and sound art where nature reveals a new and unknown, so far of the use of technology as an innovation in itself, and where sometimes, as in the work of Fernando Casas, promotes an ethic of observation and not intervention; a “natural listening,” either to detect sound through the traces of time and space, or to reveal aspects of reality that otherwise would be inaccessible to us.
In correspondence to the exhibition of Fernando Casas the now was, the before will be, CGAC own production, thus consist in a selection of works by artists of different generations, in order to illustrate the path of an essential theme –the nature– from disparate approaches as the spatial acoustics, the sound ecology, the phonograph, and a current boom in different scientific fields, such as data sonification.
ABOUT TRAILS, LANDSCAPES AND SOUND ARCHAEOLOGIES
Ángel Faraldo – Estudos Sonoros 1 e 2 
Alvin Lucier – Opera with Objects 
Mark Bain – StartEndTime (Fragmento) 
Andrea Polli and Joe Gilmore – N. 16 April 2006 
Chris Watson – Ant-Steps 
Hildegard Westerkamp – Kits Beach Soundwalk 
Christina Kubisch – Five Electrical Walks: 1. Homage with Minimal Disinformation 
Durán Vazquez – Home, Sweet Home: 5. Boat Dockage _
The work of American artist Mark Bain (1966) revolves around the interaction between acoustics, architecture and physiological reactions to the so-called infrasound. His work is a continuing investigation of the sound effects, either inherent or induced, produced in giant structures such as buildings and other public works. Normally he amplifies infrasound using seismographic equipment or induces vibrations on stilts to make audible the involved structures.
Joe Gilmore is a sound artist and of installations based in northern England. His music has been published in Alku, 12k/Line, Melange and Cut. He is co-founder of rand()%, an internet radio station that transmits real-time generative music.
Christina Kubisch (1948) is one of the most important European sound artists. She studied painting, flute and piano before taking the leap into electronic music in the mid-70s. In 1980 she participates in Für Augen und Ohren, (eye and ear) the first major exhibition of sound art. Since then, in her work the sculptures and sound installations predominate, often using ultraviolet light, solar and electromagnetic induction.
Alvin Lucier (1931) is an influential American composer of experimental music and installations focused on the exploration of acoustic phenomena. He taught until his retirement in Wesleyan University (USA) and was a key member of the Sonic Arts Union, with Robert Ashley, David Behrman, and Gordon Mumma. Much of his work is influenced by science and explores the physical installations properties of sound: spatial resonances, interference or transmission of sound through different physical media. He is the author of seminal works from the second half of the twentieth century, such as Music for Solo Performer (1964), Vespers (1968) or I am Sitting in a Room (1970).
Andrea Polli‘s work emerges naturally from the collaboration between artists and scientists from various disciplines. She is interested in global systems and their effects on individuals. Currently works with meteorologists, developing systems to understand climate information through sound.
Vázquez Durán was born in Vigo in 1979. His work focuses mainly on creating audio, radio plays and live performances. Currently, he produces the Radio Mille Collines program for radio.rakumin.org webradio. His works of long duration (up to 12), and various short pieces have been published since 2003 by independent record and music publishing network of free download. He has performed at music festivals like Sonar, ArtExSonora, Experimentaclub or In-Sonora, and institutions such as the Instituto Cervantes in Berlin, the Goethe-Institut Lisbon, SCC of Montevideo, Buenos Aires MAMBA, or MARCO of Vigo.
Chris Watson is one of the sounds registrars of wildlife and natural phenomena of the moment. In 1971 he was one of the founding members of the experimental music group Cabaret Voltaire. His career as a sound recorder began in 1981 at the Tye Tees Television. Since then he has worked as a freelance artist for film, radio and television, developed a passion and interest particular for recording sounds of animals, habitats and atmospheres worldwide.
Hildegard Westerkamp (1946) is a composer, educator and Canadian radio artist. Since the early 70s belonged to the World Soundscape Project, founded by R. Murray Shafer, his work focuses on environmental sound and sound ecology, topics she has written in abundance. Focussing attention on the details of the acoustic environment, Westerkamp brings us to the hidden interiors and environment we inhabit. It is a founding member of the World Forum for Acoustic Ecology (WFAE) and the Canadian Association of Sound Ecology (CASE).
Ángel Faraldo (Ferrol, 1980) is a composer, sound artist and improviser. Usually works with electronic and / or digital and is primarily interested in the systematic exploration of minimal resources to generate extreme conditions.