To celebrate the 40th ''birthday'' of one of the world's best bands - Weather Report - the label Art of Groove is releasing the band's Rockpalast concert in Cologne 1983 - a premiere on DVD. <p> What a feast the concert was for the Cologne-based audience that night, and is now for us all these years later. As Omar Hakim has said: ''Weather Report wasn't typical instrumental music: there was Europe, Africa, jazz, blues, Latin, all inside one thing. It was true world music....''. Here's to that! <p> After Jaco Pastorius and Peter Erskine left the band, Joe Zawinul and Wayne Shorter decided to continue their successful project with a new rhythm set: drummer Omar Hakim, Victor Bailey on bass and percussionist Jose Rossy. For Bailey and Hakim it was the starting point of their international career. <p> Weather Report's Cologne concert shows the band in musical top form. In a more than two-hour show, the band sparks a firework of rhythm and melodies. Next to classics like ''Birdland,'' in this concert you will hear pieces from later phase of Weather Report: ''D Flat Waltz,'' ''Procession,'' ''Fast City,'' ''Where The Moon Goes'' and ''Two Lines''. <p> The material which was originally recorded by the WDR (West German Radio and Television Broadcasting) has been completely restored and re-mastered and is now appearing in a new version -- something that's not just for long-time fans of Weather Report.