In 1977, filmmaker John Korty won the Academy Award for Best Documentary Feature for his inspiring film ‘Who Are the DeBolts? And Where Did They Get 19 Kids?,’ and he’s been making similarly uplifting docs ever since. His latest feature is ‘Miracle in a Box,’ which follows the story of a 1927 Steinway piano donated to UC Berkeley and restored with loving care over the course of a year. Korty is on hand to screen and discuss the film on Sunday, Nov. 20, at Sweetwater Music Hall, 19 Corte Madera Ave., Mill Valley. 11am. Free admission. 415.388.3850.