NEW YORK — Christine Baransk i was in the playground outside St. Matthew’s Church in Bedford, New York, about three years ago when she came across Matthew Guard, artistic director of the Grammy-nominated Skylark Vocal Ensemble. Christine Baranski narrates `A Christmas Carol’ before returning for `The Gilded Age’ season 4 “I love choral music,” she told him. An Emmy- and Tony-Award winning actor, Baranski went on to attend some of his concerts. “I was a fangirl basically,” she recalled. “And I think we just said, `Wouldn’t it be fun to do something together?’” Baranski agreed to narrate a music-and-spoken word version of Charles Dickens’ “A Christmas Carol” last December at The Morgan Library & Museum in New York, which owns the original manuscript of the 1843 classic. A recording was made last June at the Church of the Redeemer in Chestnut Hill, Massachusetts, and released Dec. 4 on the LSO Live label. She will perform it again with the group on Thursday night at the Morgan, which is displaying the manuscript through Jan. 11, and …