Right now, we’re listening to a selection from “The Pilgrim’s Progress,” a rare historic document of a radio play featuring Sir John Gielgud, with incidental music by RVW, made available by the Ralph Vaughan Williams Society on its own label, Albion Records.

It’s a full morning of Vaughan Williams rarities, as well as better-known works in historic performances, for the composer’s birthday. John Burkhalter of the Guild for Early Music will join me at 9:30 to talk about the 12th Annual Early Music Festival at Grounds for Sculpture in Hamilton, which will take place this Sunday. Then we’ll hear David Munrow’s recording of Vaughan Williams’ “Suite for Pipes.”

Enjoy that and much more, including the composer conducting his Symphony No. 4, until 11:00 EDT, on WPRB 103.3 FM and at wprb.com.