With a career spanning over 50 years of activity across contemporary art, performance, theater, and sound art, Orellana is a highly singular figure in Guatamalan culture. Most of his music was created using an orchestra of his self-built instruments, also known as Útiles Sonoros. Sitting at the border of sculpture, sound installation and musical instrument, these Útiles Sonoros, which he's been building and developing since the late '60s, are at the center of his artistic activity. Aside the obvious formal aspect, his compositions also have a strong political message, while being deeply rooted in Guatemalan history, folklore, and various identities, both indigenous and modern.