During the eighties, in Spain, as in many other countries all around the world, tons of electronic music cassettes appeared, often unipersonal, where the artist himself became the editor and distributor of his works. It was DIY at its purest! The appearance of the multitrack recorder and cassette duplicators helped the emergence of this phenomenon that became an international underground movement. The first cassettes published in Spain, framed within the electronic music. Pioneers such as Esplendor Geomtrico (EG-1, 1981), La Otra Cara de Un Jardn (1981), and el Internado (the first project of fame Francisco Lpez). Shortly after, artists and labels appeared throughout the Spanish geography, such as Ortega y Cassette and Laboratorio de Msica Desconocida, both in Barcelona, Auxilio de Cientos (Granada), Consumo del Miedo (Jan), Necronomicn (Puertollano), STI (Zaragoza), and on and on.The underground electronic scene in Madrid during the eighties was agglutinated largely around cassette seals such as Toracic Tapes (directed by Miguel A. Ruiz), I.E.P. (founded by musician Luis Mesa), Proceso Uvegraf (by Juan Teruel), and EGK (the sublabel for cassettes of Discos Esplendor Geomtrico). CRONICA TCNICA is a compilation of themes from this scene recorded between 1981 and 1991, most of which were originally published on cassette, and which focused mainly on Industrial, noise and experimental music. Some of the musicians, such as Uvegraf or Miguel A. Ruiz, are still active.Followers of the Industrial music and the experimental underground of the seventies and eighties (the first discs of TG and Cabaret Voltaire, Esplendor Geomtrico, Maurizio Bianchi, SPK, Asmus Tietchens, etc.) will appreciate and be surprised with this selection for its quality, specially thinking that this music has been kept hidden in the totally unknown since then.The selection was made by Andrs Noarbe, manager and editor of Esplendor Geomtrico since its founding in 1980 and director of the pioneer label in publishing electronic music.