In the 1970s, Linda Ronstadt was the most successful female rock singer in the world. In The Sound of My Voice, an HBO documentary from Rob Epstein, fans get an inside look at her life, career, and early retirement due to Parkinson's disease.

For decades, Linda Ronstadt was a revolution in the music industry. Her voice was unique, and she rose to the top of multiple genres, from rock and roll to Broadway.

Ronstadt's superpower was reinvention. When record company executives advised her against pursuing something, assuming that it would derail her career, she did it anyway.

Ronstadt was the first artist to have hit songs on the pop, rock, and R&B charts at the same time.

The Sound of My Voice, the HBO documentary about Ronstadt's life and work, explores her accomplishments before a Parkinson's Disease diagnosis cut her career short.

Famous friends of Ronstadt, such as Emmylou Harris, Dolly Parton, Bonnie Raitt, and Don Henley, share their experience with the ground-breaking musician.

The documentary is directed by Rob Epstein, who is known for his Academy Award-winning documentary The Times of Harvey Milk.