Elliott Smith was known for sad songs and whispered waltzes, but the singer/songwriter had a wide-ranging catalog. With his early band, Heatmiser, he crafted off-kilter indie-rock jams like “Half Right,” while the elaborate production of posthumously released tracks—the saloon piano on “A Passing Feeling,” the rangy guitars on “A Distorted Reality Is Now a Necessity to Be Free”—illustrates his expansive vision.