This was the first real indication to the world that Keith Jarrett was an ambitious, multi-talented threat to be reckoned with, an explosion of polystylistic music that sprawled over two LPs (now squeezed onto a single CD). Using his classic quartet (Dewey Redman,Charlie Haden,Paul Motian) as a base, Jarrett occasionally adds the biting rock-edged electric guitar ofSam Brownand always-intriguing percussionistAirto Moreira, and indulges in some pleasant string and brass arrangements of his own, along with some grinding organ smears and acceptable soprano sax. Jarrett again turns his early rampant eclecticism loose -- from earthy gospel-tinged soul-jazz to the freewheeling atonal avant-garde -- yet this time he does it with an exuberance and expansiveness that puts his previous solo work in the shade. "Common Mama," a spicy Latin workout with brass punctuations, "Take Me Back," driving soul jazz with streaks of electric jazz-rock, and the lengthy, nearly free "Nomads" are the most invigorating tracks.