Music for the Christmas season seems to fall into two categories -- the very popular carols and secular Christmas music, and music which is not widely known. These two chorale preludes offer a wonderful addition to a Christmas program because they bridge the wide gulf between the two divisions. The first one, Gottes sohn ist kommen, is a little-known but delicately beautiful chorale prelude. The second one, In Dulci Jubilo, utilizes a melody known as the English carol Good Christian Men Rejoice,...