JOSH REYNOLDS FOR THE BOSTON GLOBE

Anantawan has only one arm, but he is an accomplished violinist now training a youth orchestra in one of Boston's poorest neighborhoods.

JOSH REYNOLDS FOR THE BOSTON GLOBE

The Dudamel Orchestra is made up of 40 students in third to sixth grade at the Conservatory Lab Charter School in Brighton.

JOSH REYNOLDS FOR THE BOSTON GLOBE

Nobody at the school talks much these days about their teacher’s right arm. They’re too busy practicing.

JOSH REYNOLDS FOR THE BOSTON GLOBE

“What accessibility is, in my mind, is raising the series of potential development for any child,” says Anantawan.

JOSH REYNOLDS FOR THE BOSTON GLOBE

Anantawan is driven by the idea that music is “an inherent civil right.”