“I want nothing more than to be a loner,” Emily Kempf sings early on Flower of Devotion, the new album by Chicago trio Dehd. It’s a startling admission coming from a songwriter who, just a year ago on Dehd’s critically acclaimed Water, wrote eloquently about the joys and pains — more than anything, the necessity — of love, compassion, and companionship. But then, “admission” isn’t really the right word here, given the stridency of Kempf’s tone. “Loner” is a declaration. The record ups the ante on Dehd’s sound & filters in just enough polish to bring out the shining and melancholy undertones in Jason Balla and Emily Kempf’s songwriting, even as it captures them at their most strident. Balla’s guitar lines at times flirt with ticklish cosmic country, while at others they reflect the dark marble sounds of Broadcast. Kempf, meanwhile, establishes herself as a singer of incredible expressive range, pinching into a high lonesome wail, letting loose a chirping “ooh!,” pushing her voice below its breaking point and letting it swing down there. When she and Balla bounce descending counter-melodies off one another over McGrady’s one-two thumps, or skitter off over a programmed drum pad, they sound like The B-52s shaking off heartache.