For many, 2013’s “Feelin” offered the first sample of German producer Florian Kupfer’s gorgeous take on lo-fi house. That song’s sinister, stalactite-like synths and distorted drums made way for one of the more memorable vocal flips in recent years—a timid, warbling voice repeating “I can’t stop this feeling,” twisting each time between a proclamation and a frightened resignation. Many producers associated with the experimental techno label L.I.E.S. can seem obtuse, but Kupfer’s tracks are among the most accessible of the bunch. —David Ford Smith