Jacques Audiard on ‘Emilia Pérez’ and Learning to Make a Musical

The French filmmaker Jacques Audiard is known for hard-hitting crime dramas with incisive social commentary. He doesn’t often enjoy musicals and doesn’t speak Spanish. Yet his latest work, the offbeat “Emilia Pérez,” which began streaming Wednesday on Netflix, is a Spanish-language musical set amid Mexico’s drug wars.

He lifted his protagonist from the pages of Boris Razon’s 2018 novel, “Écoute,” about our hyperconnected, perpetually online world. One chapter features a ruthless Mexican cartel boss seeking a gender transition who hires a lawyer to help with the logistics.

For the titular role, Audiard, 72, cast the Spanish actress Karla Sofía Gascón (a trans woman herself), and changed the attorney in the book from a man to a woman played by Zoe Saldaña. To write the movie’s many tracks, the director enlisted the singer Camille Dalmais and the composer Clément Ducol.

Shot almost entirely on soundstages in Paris, the film debuted in May at the Cannes Film Festival to mostly positive reactions that praised the film for its way of “testing the limits of character sympathy as well as shifting tones and moods,” as The Times’s chief critic, Manohla Dargis put it, though some reviewers expressed reservations about the portrayal of Emilia Pérez, herself. In the end, the film’s four stars — Gascón, Saldaña, Selena Gomez and Adriana Paz — shared the best actress award, while the film itself won the jury prize (essentially third place).

Speaking through an interpreter during a recent video interview while in the United States, Audiard explained how he came to try his hand at musicals with this timely subject.

These are edited excerpts from the conversation.