[2] A prominent figure in post-WWII European Jazz, Mengelberg is known for his forays into free improvisation, for bringing humor into his music, and as a leading interpreter of songs by fellow pianists Thelonious Monk and Herbie Nichols.

Also on that record was the drummer Han Bennink, and the two of them, together with saxophonist Piet Noordijk, formed a quartet which had a number of different bassists, and which played at the Newport Jazz Festival in 1966.

[8] In 1967 he co-founded the Instant Composers Pool, an organisation which promoted avant garde Dutch jazz performances and recordings, with Bennink and Willem Breuker.

He often performed in a duo with fellow Dutchman Bennink, with other collaborators including Derek Bailey, Peter Brötzmann, Evan Parker, Anthony Braxton, and (on the flip side of a live recording with Dolphy) his pet parrot.

[9] As leader With Eric Dolphy With Han Bennink With Louis Andriessen With ICP Orchestra With Anthony Braxton With Peter Brötzmann With Dudu Pukwana With Keshavan Maslak With Roswell Rudd With Pino Minafra With Franz Koglmann With Steve Lacy With Yuri Honing With Paul Termos With Benjamin Herman With Alessandra Patrucco With Frank Gratkowski With Ab Baars and Ig Henneman With Berlin Contemporary Jazz Orchestra