Kathy Wood is sharing this now since she'll still be away for the holidays the first part of January.  The St. Olaf Choir, which has set the standard for a cappella choral singing in this country since it was founded in 1912 by F. Melius Christiansen, will perform a concert at Strathmore Hall on Sunday, February 4 at 3 p.m.  The choir -- comprised entirely of students at St. Olaf College in Minnesota -- frequently tours internationally to critical acclaim; venues have included the White House, the Vatican, the Seoul Olympics Arts Festival, and more.  Some of you may have heard their annual Christmas concert on PBS or NPR.