There is a slightly creepy appeal to The xx, a trio from London who recorded their album in basements and would only record in a studio at night. Both the female and male vocals share a lethargic way of expression backed by slow rhythmic bass lines and a drum machine. Their music, in general, can be confusing and seem to drag a bit, but they have found much success in the NYC area with devoted fans who prompt The xx to consistently sell out venues. They are going to be at NYC’s Webster Hall on March 31. thexx.info.