Aston Magna — America’s longest-running festival of music on period instruments, now in its 53rd season — presents Seeking an Other: music from South America, Scotland, China and more, led by guest director Julia Glenn. Performers: Julia Glenn and Daniel Stepner, baroque violins; Nathaniel Cox, theorbo and guitar; Andrew Koutroubas, baroque cello; Andrus Madsen, harpsichord. Tickets: $50 in advance, $60 day of show at the venue. Under 30: $15 with ID. Full-time students (with ID) and children free. EBT, WIC & ConnectorCare cardholders: $2 through Card to Culture. Tickets at astonmagna.org or 888-492-1283.