Out of the blue comes this double disc set featuring two distinguished alumni, both sadly now departed, of two parallel streams of musical pioneering. German bassist Peter Kowald was one of the authors of European free improvisation. Though initially in the shadows of his more assertive compatriots, saxophonist Peter Brötzmann and pianist Alexander von Schlippenbach, he came into his own through giving full rein to his open spirit and almost obsessive desire to communicate, culminating in his Global Village concept and appearances with virtually every free jazz luminary.  American saxophonist Julius Hemphill was one architect of the groundbreaking St Louis Black Artists Group, evincing a particular talent for fresh composition, a point pressed home by his justly lauded early masterpiece Dogon A.D. (reissued by International Phonograph in 2011), reissued on CD.