After just one album — 2013’s self-titled dance-funk workout — London trio Factory Floor has slimmed down to a duo. Perhaps relatedly, their already minimalist compositions became even more spare, and 25 25 features several tracks that are positively skeletal. The songs often consist of one warbling electronic squiggle that serves as both the bass and the lead melody, along with a smattering of live and programmed percussion. On top of this foundation, the duo adds dublike sound effects and abstract, heavily reverberating dashes of vocals, none of which stay stagnant for long. The effect of these additions is akin to driving on a rainy night and passing neon signs that appear as blurs of color against your windshield, receding in the distance as quickly as they arrived. Sometimes, the juxtaposition of sound effects can be playful, as on the descending bass line and call-and-response moans of “Relay.” This is still dance music, albeit in an artistic fashion that often recalls the combination of early rap and art school of the 1980s Talking Heads spinoff band Tom Tom Club. The album’s early singles “Dial Me In” and “Ya” rely on a clear, steady pulse that the duo gradually tinkers with, similar to the approach of their more-ballyhooed labelmates LCD Soundsystem.