The title Luiz Vaz 73 evokes the work Os Lusíadas [The Lusiads], by Luiz Vaz de Camões, published 400 years previously in Lisbon, in 1573. The ten cantos of the epic poem inspired the composition of a work of electronic music with the same title, produced by Jorge Peixinho in Ghent, at the Institute for Psychoacoustics and Electronic Music, between 1973 and 1974. In 1975 by Jorge Peixinho and Ernesto de Sousa initiated the ‘musical/visual involvement’ Luiz Vaz 73, based on four of the ten cantos of the poem (I, III, IX and X).

The work is simultaneously a spatial project and a visual and sound project, based on a visual structure coincidence and a musical compostion, with live instrumental improvisation (acoustic instruments and instruments outside the conventions of Western erudite music, most of them the originals used by Peixinho) by the Lisbon Contemporary Music Group, founded by Jorge Peixinho in 1970.