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Some think the capital city isn’t exactly a new-music capital, but what other town would have presented Cecil Taylor or Tan Dun’s Ghost Opera for free? We’ve also got seat-of-the-pants promoters like Derek Morton, Transparent Productions, and Chuck Bettis, as well as the Punk, Not Rock salon, wedging unconventional tonalities into the town’s music scene. The Galaxy Hut is doing its part tonight with its second Fringe Music Night presentation. Featuring Gray Code (three-man ensemble Comma—Thomas Bickley, Matthew Ross Davis, and Joseph Zitt—plus Jonathan Matis and Brian Fending on guitar and percussion), the show will fill the Hut with the sounds of improvisation, aleatory composition, and electro-acoustic soundscapes. Premieres include a piece by Matis that uses a Boggle game to compose its score and Davis’ John Cage-inspired take on Mozart’s operas. At 9 p.m. at the Galaxy Hut, 2711 Wilson Blvd., Arlington. Free. (703) 525-8646. (Christopher Porter)