The Sound of My Voice

True to the title, though, the documentarians devote much of the film to archival footage of Ronstadt singing during her prime. Listening to one of the most successful pop stars of the 1970s blast through many of her hits, including “Different Drum,” “You’re No Good” and “Long Long Time,” with the warmth and might of a sunbeam for 95 minutes proves a beguiling pleasure worth soaking in.