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.

In 1967, they applied their collective energies to the formation of a Dutch avant-garde movement called the Instant Composers Pool, or ICP.

Official music video by the Instant Composers Pool Orchestra.

Van Bergeijk also studied oboe and alto saxophone, playing with Peter Brötzmann in the Instant Composers Pool orchestra.

One of the founding members of the Instant Composers Pool (with Misha Mengelberg and Willem Breuker).

In the 1960's, Mr. Bennink, a ferociously gifted drummer from Amsterdam, helped found the Instant Composers Pool, one of the hubs of modern European jazz.

Tracks 1-3 feature Getatchew Mekuria playing with Instant Composers Pool recorded live at the Paradiso, Amsterdam, November 19, 2004 as part of The Ex's 25th Anniversary Concert.

Instant Composers Pool ICP 007/008 (2 LPs).

"ICP [Instant Composers Pool]".

In the Fishtank 9 features Sonic Youth, the Instant Composer's Pool Orchestra, and The Ex.