If you ever wondered what it might sound like if a whimsical indie rocker got together with an adventurous experimental composer and an iconoclastic rapper, Sisyphus will satisfy your curiosity. Featuring Sufjan Stevens, Son Lux, and Serengeti, this project is nominally hip-hop, its nervous boom-bap beats and kinetic rapping flanked by a wily array of synths, strings, and electronic textures. Album opener "Calm It Down" sounds like jilted '90s rap—that is until it melts into atmospheric shoegaze in its second half, with Stevens borrowing the mic to sing the song to sleep. There are moments of captivating beauty here ("I Won't Be Afraid"), mixed in with moments of quizzical experimentation ("Booty Call"). "Alcohol," with its enticing Nine Inch Nails electro-march vibe, is a standout. Sisyphus is a dizzying, engrossing listen. You'd expect nothing less from this trio.