As a composer, Eduardo Fernández studied with Héctor Tosar (approx. 1980-1984), and he has participated in composition seminars with Helmut Lachenmann, Dieter Schnebel and Nikolaus A.Huber. He was invited to visit Germany by the Deutscher Musikrat, where he had the opportunity to show his production and have several encounters with important German composers, among others Helmut Lachenmann, Dieter Schnebel and Matthias Spahlinger. Apart from some early works, his activity as a composer begins in 1980, when he got a prize in a competition in Uruguay for his "Two pieces for string quartet".
His production tends simultaneously to aesthetics of sparseness and to those of the very elaborate. The "austere" works tend generally to conceptual ideas (for instance, "A Meditation on 'Sakura'" or "Esto no es una pieza"), where the musical events have the purpose of suggesting various processes, sometimes built with the help of mathematics; the "elaborate" works (the most typical example would be "Quiero decir" (tr."I mean" or"I want to say" or "I want to speak") tend to have great richness of detail, and they base their events in the exhaustive development of musical elements.
For guitar or guitars:
- Dos piezas for string quartet.
Composed 1980, revisado 1982. First performance by Cuarteto Anglo, 1980 (NMN). Length ca. 7 Minutes.
- Psikhé for 4 soprano recorders.
Composed 1982. Not released. Length ca. 7 Minutes.
- Formal for harpsichord.
Composed 1982. First performance by Eduardo Gilardoni (1985, NMN). Length ca. 5 Minutes.
- Perspectivas (for guitar and strings: 4 violins, 2 violas, 1 violoncello, 1 contrabasso).
Composed in 1982-3. First performance 1986 by the composer and the Orquesta Sinfónica Municipal, dir. P. I. Calderón. Length: ca. 12 Minutes
- Quinteto for flute, oboe, clarinet, bassoon and corn.
Composed 1983. Not released. Length ca. 20 Minutes.
- Luna for 8 voice choir, on a text by Líber Falco.
Composed in 1984. Not released. Length ca. 5 Minutes.
- Opuestos for solo flute.
Composed in 1986. First performance 1986 by Graciela Svara (NMN).
- Quiero decir (flute, violín and guitar)
Composed in 1991-2. First performance 1993 by Fernando Hasaj, Gladys Margounato and the composer (NMN). Length ca. 8 Minutes. Dedicated to Fernando Hasaj and Gladys Margounato