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Vinyl is dead, but collectors must be busier than ever: Shudder to Think has a CD on Epic, a PVC equivalent on Sammich, and two 7-inches on Sub Pop. One of the latter is a split single with the estimable Sunny Day Real Estate, the band with which it’s shared stages since Nov. 11: Shudder does “X-French Tee-Shirt” and Sunny does “In Circles” and both are alternately sweet and stormy in a manner that’s neither too tortured nor too glib. The tour concludes tonight with Brainiac and Saturday with Guvner, with shows at 9:30 p.m. at the Black Cat, 1831 14th St. NW. $6. (202) 667-7960. (Mark Jenkins)