At the Irish Arts Center ( where adult classes for the winter semester have just opened up this week comes another in a series of master classes with visiting musicians. Next up is the Lunasa tandem of Cillian Vallely (whistle and uilleann pipes) and Kevin Crawford (flute and whistle) taking place on Sunday, January 25. The workshops are from 1-4:30 p.m. (553 West 51st Street) followed by a concert from 5 -6 p.m. Separate prices apply for the workshop and concerts or as a package Call Rachael Gilkey at 212.757.3318 ext 209 or for information . . . The Gaelic Roots program of Irish music, song and dance continues to offer some great programming at Boston College under the direction of its Sullivan Artist-in-Residence Seamus Connolly, who ran the late-lamented summer school there for a number of years. Upcoming are two lectures that may be of interest to anyone within easy driving distance of BC's Chestnut Hill Campus where Connolly House is located. This Thursday, visiting UCG scholar and PhD candidate Meabh Ni Fhuarthain will talk about her principal research topic of Comhaltas Ceoltoiri Eireann as "a literal and powerfully symbolic agent of culture" and its place in Irish society. The lecture, entitled "Notai do Mholtoiri/Notes for Adjudicators: Codifying Irish Traditional Music and Comhaltas Ceoltoiri Eireann" takes place from 6:30-7:30 p.m. A week later on Wednesday the 28th, from 6:30-8 p.m., Dr. Ann Spinney of BC will lecture on the ""Regional Styles in Irish Music: A Conversation." Both programs are free to the general public and sponsored by the Center for Irish Programs at Boston College (Phone: 617-552-3938 or