This week: modern and ancient ballads from Gretchen Peters, Lau with Karine Polwart, Salt House, and Kacy and Clayton. Also some instrumental tracks featuring gorgeous fiddling from the likes of Sam Sweeny, Benedict Morris and Christian Sedelmyer (with Andrew Marlin). And new music from Eli West, Jeffrey Foucault , Amanda Anne Platt and The Honeycutters, and The Travellin' McCourys.