A full band is no longer a necessary ingredient for a rocking live show. Many artists write and record entire albums with just a laptop, and listeners connect with sounds that challenge our notions of traditional musicianship. Baths, the brainchild of L.A.-based Will Wiesenfeld, buys into that tradition. His 2013 album Obsidian is a dark masterpiece, one that couples hooks with infectious beats and sinister overtones. Songs like “Ossuary” and “No Eyes” feature lush instrumentation and driving rhythms, but the driving force of the album is Wiesenfeld’s voice, which imparts vulnerability and confidence in equal measure. His lyrics are breathtakingly personal, focusing on mortality, relationships, and lust. Though Baths may not tour with a full band, he’s the sort of performer who’ll help you realize that full bands are the old standard. Baths perform with Young Feathers and P. Morris at 8 p.m. at U Street Music Hall, 1115 U St. NW. $15. (202) 588-1880. ustreetmusichall.com.