German trombone player Albert Mangelsdorff (1928-2005) was an international phenomenon. He was mostly famous for a technique in which he would play notes and sing simultaneously. We will start with a number of duets with famous musicians from the late 1960s, and after that solo pieces from 1972.
Sources:
Albert Mangelsdorff and his Friends (MPS 0211961 MSW)
Albert Mangelsdorff Solo (MPS 06025 1779743)