Chevalier Theatre welcomes the Grammy Award-winning Rodrigo y Gabriela — the Mexican acoustic guitar duo of Rodrigo Sánchez and Gabriela Quintero — for their first Medford performance. Rodrigo y Gabriela grew up on an eclectic mix of classic rock, heavy metal and flamenco, a rare alchemy of influences that still informs their work today. Their current tour carries the name of their new album, “In Between Thoughts…A New World,” which features the duo’s signature dual guitar attack augmented by a full orchestra. Ondara will open the show. Tickets are $55 to $125 (with VIP meet-and-greet tickets at $250) through the Chevalier Theatre website/Ticketmaster. Tickets also may be purchased, free of online ordering fees, at the Chevalier Theatre Box Office, which is open on Fridays and Saturdays from noon to 6 p.m., as well as two hours before every Chevalier Theatre show.