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SOUND FAMILIAR? Although the weekend was up 10% compared with the same one in 2010, ticket sales were down about 3% on the year to $10.2 billion, according to the L.A. Times, sourcing Hollywood.com, while attendance fell to a 16-year low. Music moguls are now counseling their movie-biz counterparts on coming to grips with diminishing expectations. (1/3a)