Hope you enjoyed Brooklyn’s biggest free music festival while it lasted: The Village Voice announced last night it killed the Coney Island Siren Festival in favor of a new one called 4 Knots at the South Street Seaport in hip, young downtown Manhattansburg. Siren was a summertime tradition (albeit a hot and sweaty one, like all good music fests) but perhaps its death is symbolically parallel to the overall mucusy sickness of Coney’s attempted rebirth. The two-stage fest over the decade featured Ted Leo, Built to Spill, Frightened Rabbits, TV on the Radio, M.I.A. and the New York Dolls among many others. Says the Voice: “Siren had a fantastic 10-year run, but the 4 Knots Festival will replace it on the Voice’s summer-show docket. Embrace change!” No lineup has been announced yet, so we’ll see.