Rory Makem is Irish music royalty. His grandmother, Sarah, was a master of traditional songs, and his dad, Tommy, brought Irish music out of its corner of the world and into the international spotlight. Rory keeps that grand tradition alive with Makem and Spain, a vocal trio that includes Liam and Mickey Spain, two brothers whose own voices hark back to the motherland while remaining uniquely contemporary. Hear their voices boom while their fingers pluck traditional instruments at Rogers Center for the Arts in North Andover.