Documentarian Maryam Sepehri, right, interviews Hamid Naficy, the subject of “Mouth Harp in Minor Key” at his home in Chicago. Naficy, a cultural studies scholar at Northwestern University, left his home country of Iran in 1979. Photo courtesy of Sepehri.

Documentarian Maryam Sepehri, right, interviews Hamid Naficy, the subject of “Mouth Harp in Minor Key” at his home in Chicago. Naficy, a cultural studies scholar at Northwestern University, left his home country of Iran in 1979. Photo courtesy of Sepehri.

Documentarian Maryam Sepehri, right, interviews Hamid Naficy, the subject of “Mouth Harp in Minor Key” at his home in Chicago. Naficy, a cultural studies scholar at Northwestern University, left his home country of Iran in 1979. Photo courtesy of Sepehri.