“Ennio” is a virtual love letter of a documentary from Italy’s Oscar-winning director Giuseppe Tornatore (“Cinema Paradiso”) to his distinguished, Oscar-winning compatriot, the prolific maestro of film scoring Ennio Morricone. “Ennio” opens at the Coolidge Corner Theatre in Brookline on March 29.

With a prodigious 400 film scores Morricone, 91 when he died in 2020, is known for his many Sergio Leone movies beginning with “A Fistful of Dollars” and “The Good, the Bad and the Ugly,” “The Mission,” “The Untouchables” and his Oscar winner, Quentin Tarantino’s “The Hateful Eight.” “Ennio” reveals a musical childhood. His father was a trumpeter who decided, no questions asked, that his son would be one as well.