“Trip-hop” eventually became a ’90s punchline, a music-press shorthand for “overhyped hotel lounge music.” But today, the much-maligned subgenre almost feels like a secret precedent. Listen to any of the canonical Bristol-scene albums of the mid-late ’90s, when the genre was starting to chafe against its boundaries, and you’d think the claustrophobic, anxious 21st century started a few years ahead of schedule. Looked at from the right angle, trip-hop is part of an unbroken chain that runs from the abrasion of ’80s post-punk to the ruminative pop-R&B-dance fusion of the moment. PITCHFORK