Kassel Jaeger is a French-Swiss artist based in Paris and a member of the GRM (Groupe de Recherches Musicales). Deltas is his fifth album, and first on vinyl. "Campo Del Cielo" (2012): Commissioned by Espace Mendes France for a performance at The Planetarium in Poitiers, France, diffused on an 8-channel system. The sound material is exclusively derived and processed from stone recordings. The first part, "Aerolite (flying stone)," is mainly based on aerial field recording of stone manipulations. The second part, "Baetylus (sacred stone)," is made with electromagnetic capture of meteorite resonances. This meteorite was part of the Campo Del Cielo site. "Deltas" (2012): "Whenever the volume of water is so great as to counteract and almost neutralize the force of tides and currents, and in all cases where the latter agents have not sufficient power to remove to a distance, the whole of the sediment periodically brought down by rivers, deltas are produced." "A Guest + a Host α" (2011): Commissioned for Ina-GRM's Retro/Actif at La Gaîté Lyrique, Paris, France. Originally displayed on 16 channels, this work is exclusively composed with non-processed and original sounds made with the legendary Coupigny Modular Synth housed in the Groupe de Recherches Musicales' studios. This work is structured as three dialectical parts: electricity + crystals = spectrum. "A Guest + Host = Ghost" (M. Duchamp). Mastered with Robert Hampson at 116 Bunker, Paris, May 2012. Cut by Rashad Becker at Dubplates and Mastering, Berlin, July 2012. Layout by Stephen O'Malley.