Coming to theaters in September will be the new documentary, Linda Ronstadt: The Sound Of My Voice. Best Classic Bands reported the career spanning film was directed by Academy Award-winning filmmakers Rob Epstein and Jeffrey Friedman and produced through CNN Films, which has also acquired the broadcast rights to the film. The doc, which opened earlier this year at the Tribeca Film Festival, scored the Documentary Audience Award at the Provincetown International Film Festival.

Linda Ronstadt: The Sound Of My Voice features interviews with Ronstadt spanning 50 years, with performances and interviews with such friends and frequent collaborators as Emmylou Harris, Dolly Parton, Bonnie Raitt, Jackson Browne, and JD Souther.

According to the press release for the doc: "With one of the most stunning voices to ever hit the airwaves, Linda Ronstadt burst onto the 1960's folk rock music scene and became the most successful female musician of the 1970's. She sold out stadiums around the world and was the highest paid female performer in rock and roll. Ronstadt's singing range was second to none and she recorded hit records across rock, opera, jazz and Mexican folk, which channeled her Mexican ancestry."

Linda Ronstadt has admittedly shared a microphone with the best in the business -- and she says that all our secrets and personal information are audible by the sound of our voices: "I can hear their life, I can hear the state of their health, I can hear, y'know, whether they feel good about singin' that note -- I mean, you can hear so much. I don't always listen with that intensity -- I can hear lying, y'know? I think people in law enforcement get really good, they have a talent for it to start with. My brother was, is a good singer, but he was the chief of police in Tucson for years and you do not ever want to tell him a lie, because he's gonna know (laughs) in one word. He's gonna know halfway through the sentence, you're lying. So, you can hear that kind of stuff in a voice. I don't think we have very well trained ears in a lot of ways."

AUDIO: LINDA RONSTADT ON HEARING TRUTH IN VOICES