Pushing play on Desperately Imagining Someplace Quiet, it is easy to imagine that it is the year 1998, and your cool older sister has returned from her freshman year at college only to hand you the sort of mind-altering mixtape out of which lifelong rock fanatics are born. It is the sort of record Beck might have made in his prime, if you swapped out the hip-hop and delta blues of Odelay for midwestern emo, Scottish power-pop, and the sort of all-American indie that functions as “classic rock” for this cherubic cohort.