Multi-instrumental duo Christy Martin and Aodh Og O’Tuama will play traditional and original Celtic, folk and world music at 7:30 p.m. Tuesday, May 20, at Headwaters, 84 Fourth St., Ashland. Tickets cost $15 to $20 at the door.

Multi-instrumental duo Christy Martin and Aodh Og O’Tuama will play traditional and original Celtic, folk and world music at 7:30 p.m. Tuesday, May 20, at Headwaters, 84 Fourth St., Ashland. Tickets cost $15 to $20 at the door.