By Carolyn Brown
For the Valley Advocate Acclaimed folk-blues singer-songwriter Chris Smither, who lives in Amherst, never expected to be cast in a Netflix movie — and he certainly never expected to be part of a project that won an Oscar. “It’s pretty special, all the more because it was just a fluke, really,” Smither said. “I feel like I almost had nothing to do with it. It just fell into my lap. It fell into my lap because I spent a lot of tim…