Today’s Tufts Composers New at Noon program, titled “Three-In-One,” features the London-based Fidelio Trio: Darragh Morgan, violin; Tim Gill, cello; and Mary Dullea, piano. They’ll perform new American and Irish works by T.J. Anderson, David Fennessy, John McDonald, and more, followed by a workshop of Tufts student compositions. Free to the public with no tickets required; also viewable via Tufts Music Live Streaming.