He started as a song composer and later approached the movie soundtrack field.
One film soundtrack that he contributed to was Il grido, a 1957 Italian drama directed by Michelangelo Antonioni, which included “Non lo saprai mai” (You will never know it) by Piga and Renato Barneschi.
"Come to My Arms", which Piga wrote with Maurizio de Angelis and Jack Elliott featured on the British television programme Six-Five Special in 1958, where it was performed by Dickie Valentine.
[2] After a promising career as a music writer, he decided to start working as a film producer in the late 1960s.
In the 1990s Piga left Italy to retire in New York where he spent his last days until 1994.