During the early seventies the quartet was revived with Sauer, Buschi Niebergall and Peter Giger (1973–76). At the same time Mangelsdorff was exploring the new idiom with Globe Unity Orchestra, but also with many other groups (e.g. the trio of Peter Brötzmann). At that time, thanks to Paul Rutherford, he discovered multiphonics, long solistic playing and experimental sounds.
He performed as unaccompanied trombonist in an impressive concert set. In the 1970s he made first solo recordings and collaborated with Elvin Jones (1975, 1978), Jaco Pastorius and Alphonse Mouzon (1976), John Surman, Barre Phillips and Stu Martin (1977) and others. In 1975 he was co-founder of the United Jazz and Rock Ensemble that existed for more than 30 years, and recorded duo albums with Wolfgang Dauner (from 1981). In 1976 Mangelsdorff started teaching jazz improvisation and style at Dr. Hoch's Konservatorium in Frankfurt. [Source: https://en.wikipedia.org/wiki/Albert_Mangelsdorff]