Classical richness with folk/pop seasonings makes This Glorious Christmas a tasty sonic experience. The Annie Moses Band — a sibling quintet with Texas roots — offers their own interpretations of traditional favorites along with a sprinkling of originals. The emphasis is on instrumental pieces that combine the serene dignity of a chamber recital with the improvisational flair of a jazz set. Classical buffs will detect an Aaron Copland influence in the improvisational accents enlivening “Go Tell It On the Mountain” and “It Came Upon a Midnight Clear,” while Celtic music fans will enjoy the Irish colors in “Sussex Carol.” “We Three Kings” and “God Rest Ye Merry Gentlemen” ride upon a swirling interplay of harp, violin and cello, and lead singer Annie Moses’ crystalline soprano lends luster to the album. The group’s self-composed tunes show off their diverse influences, ranging from country/pop (“Little Baby”) to theater music (“Bethlehem, House of Bread’). This Glorious Christmas provides old-fashioned musical pleasure served up with a virtuoso’s flourish.