Albert Mangelsdorff Quintett – Birds Of Underground

German trombonist Albert Mangelsdorff was a major innovator who has had an influence on jazz instrumentalists worldwide. His use of multiphonics, which utilizes vocalizing into the horn to produce chords and overtone effects, was ground-breaking. This 1973 album presented his newest group, with German saxophone great Heinz Sauer the one remaining member from Albert’s legendary 1960’s quartet.