His compositions include the world famous Upa Neguinho (with Gianfrancesco Guarnieri), Pra Dizer Adeus (with Torquato Neto) (also known in its English version as "To say goodbye"), Choro Bandido (with Chico Buarque), Beatriz (with Chico Buarque), Arrastão (with Vinicius de Moraes), Canto triste and Ponteio (with Capinam).
Trained as a classical pianist, Eça created a formal, but stunning approach to bossa nova classics such as "The Hill" by Antonio Carlos Jobim and works by Edu Lobo.
Lobo | Edu Lobo | Rebecca Lobo | Lobo (musician) | Baltasar Lobo | Willie & Lobo | Porfirio Lobo Sosa | Lobo (DC Comics) | Lobo (DC comics) | António Lobo Antunes | Anthony Theodore Lobo | Amberley Lobo | Tatiana Lobo | Rogerio Hyndman Lobo | Michael Lobo | Lobo (Dell Comics) | Lobo Antunes | Julio Lobo | Jerónimo Lobo | Ildo Lobo | El Retorno del Hombre Lobo | Dja-et-Lobo |
In addition to composing and performing his own work, Horta has worked for many years as and arranger or sideman for many important Brazilian artists, such as Elis Regina, Milton Nascimento, Maria Bethania, João Bosco, Airto Moreira, Edu Lobo, Nana Caymmi, Flora Purim, Gal Costa, Sérgio Mendes, Chico Buarque, Flávio Venturini, Joyce, Johnny Alf, Wagner Tiso, Francis Hime and Beto Guedes.