Michael Corwin adds a lot of welcome grit to his music. The singer-songwriter sits squarely in the country-folk wheelhouse — though he occasionally ventures outside, like the rockabilly boogie "Error of my Ways" — but there's a lot of unique edge and darkness to his music. It's a reminder of the grizzled old folk singers that would routinely sing about murder, revenge, prison, and soul-crushing heartache — you know ... life. Corwin is a talented story-teller, using a voice that seems made specifically for dark folk, and an equally gifted guitar player. His debut full-length, "Last Cigarette Promises," was released last November, and should be heard by folk lovers wondering where the "oomph" went.