His vision for the band was for it to be a musical synthesis of extreme metal and progressive rock, drawing extensively from dark fantasy literature and gore films for inspiration.
By the time of the release of their first demo, Parajes de lo Desconocido (1985), Dorso was a trio led by its original frontman and two new hires, Gamal Eltit in guitars and Jaime Palma in drums.
We wanted this album to be symphonic, yet metal.Eltit and the newly hired drummer Eduardo Topelberg left the band citing musical disagreements after recording Romance.
The album's heavy use of Spanglish, black humor and bilingual puns, as well as Soms' distinctive riff-writing became the defining characteristics of the band's sound.
In 2008 the band released Espacium, and in 2012 Recolecciones Macabras del Campo Chileno, featuring for the first time some doom and black metal elements, with lyrical themes revolving around Chilean myths and legends.