LCD Soundsystem’s career ended quite magically, in 2011, with a concert at Madison Square Garden. At the end of the night, after an almost decadelong run during which the group changed what both dance music and rock bands could do, balloons fell from the ceiling, strangers hugged one another, and devoted fans cried. The next year, a documentary, “Shut Up and Play the Hits,” captured the concert’s staging and immediate aftermath, and also James Murphy, the group’s sole full-time member, having long, thoughtful conversations about the musical legacy he was leaving behind. In 2014, a lavish boxed set arrived to further commemorate that glorious last hurrah. Murphy, who is now fortyseven, retired to a life of seeming leisure, opening a wine bar, roasting coffee beans, and indulging in one-off, prestige…
