Send classical listings two weeks in advance to email@example.com.Concerts & EventsSeattle Symphony Mark Kosower is the soloist for Barber's Cello Concerto; Gerard Schwarz also conducts Dvorak's Serenade for Strings and Elgar's Enigma Variations. Benaroya Hall, Third Avenue and Union Street, 215-4747, www.seattlesymphony.org. $15-$89. 7:30 p.m. Thurs. Jan. 4, 8 p.m. Sat. Jan. 6.Sunship & Stuart Dempster A gig with the sonic explorer and the improv ensemble he often collaborates with. Egan's Ballard Jam House, 1707 N.W. Market St., www.ballardjamhouse.com. 7 p.m. Sat. Jan. 6. Thomas Martin Music by the three B's—Bach, Beethoven, and Bottesini—from this double-bassist, with violinist Maria Larionoff. Part of the "Barry Lieberman and Friends" series. Brechemin Auditorium, UW School of Music, 685-8384, www.music.washington.edu. $10. 2 p.m. Sun. Jan. 7.Billet-Deux This gypsy jazz quartet performs as part of the Seattle Jazz Vespers series, every first Sunday at Seattle First Baptist Church, Harvard Avenue and Seneca Street, 325-6051, www.seattlejazzvespers.org. Free. 6 p.m. Sun. Jan. 7.Markus Groh Acclaimed for his Liszt, this German pianist offers that composer's Années de pélerinage alongside Brahms and Mozart. Meany Hall, UW campus, 543-4880, www.uwworldseries.org. $33. 8 p.m. Tues. Jan. 9.OperaAmahl and the Night Visitors Twelfth Night Productions stages Menotti's take on the Nativity story. Youngstown Cultural Arts Center, 4408 Delridge Way S.W., www.twelfthnightproductions.org, www.brownpapertickets.com. $7-$12. 7:30 p.m. Fri. Jan. 5, 3 & 7:30 p.m. Sat. Jan. 6, 3 p.m. Sun. Jan. 7.