Check out that personnel list and genuflect most deeply. Those who write books with a strapline When Genres Collide (see this month's book section) may wish to ponder what fusion really entailed as the 1970s peaked. What gets left out of the story so often is that it was largely a black phenomenon, with not just rock but huge elements of soul and funk sweat adding to the magic mix that made the music so potent. Creed Taylor got this better than most and this two-fer of his high-concept production values is a classic of its kind: yeah, hard-rocking when needs be, to the edge of pastiche, but the likes of ‘Taxi Blues’ still make your backbone slip. But it's also dancefloor savvy as on Silk's title track, with an irresistible Turrentine theme and Gale's slick rhythms. Clarke is notably on top of his game, funky as you like, while, yes, that is a hot Wynton on a latin-infused ‘Hot Fire’ before his sound became frozen in aspic.