With house, electro, techno, or dance music as a whole, there’s a specific sweet spot where a tune can just as easily be rinsed on a hazy dancefloor as it can be received like a looping spiritual mantra, bridging a most unique gap between celebration and therapy. Rezident, the project of emerging 22-year-old producer David Roif of Karlsruhe, the city in Germany’s southern Baden-Württemberg state, demonstrates that electronic music best sustains itself when these separate entities interlock.