Trip-hop is the sound of a city: Bristol in the early 90s, where sound-system culture, dub, hip-hop and punk had been stewing together for a decade.
Out of the Wild Bunch collective came Massive Attack, whose Blue Lines slowed hip-hop to a narcotic crawl and gave the whole genre its tempo and its mood.
Portishead added noir and vinyl crackle; Tricky turned it inward and paranoid. The London end (Mo' Wax, Ninja Tune) ran with the instrumental, sample-built side.
The name was always contested, most of the originators hated it, but the sound was unmistakable: heavy, blue, and built from records.