In the opening moments of Archy Marshall’s 2010 single “Out Getting Ribs,” a cough punctures the stillness. It’s a subtle cue that the chiming, guitar-driven confessional that follows is going to be raw, unfiltered teenage angst. Or it would be if the same cough didn’t appear at the start of “Bleak Bake,” the second track on the 17-year-old’s debut EP as King Krule. Along with being blessed with an eye-catching shock of red hair and a beautiful, baritone vowel-abuser of a voice, the Londoner formerly known as Zoo Kid possesses a canniness that belies his years. With economical application of upright bass, violin stingers, and amphibious, reverberating guitar, the five-song King Krule EP locates a tantalizing Venn-diagram intersection of dub and jazz that still somehow manages to recall Billy Bragg and the bleak, baroque pop of Bill Fay.