Panhuysen started to develop his "situasies", works which combined many media - images, sounds, light, projection, machines, objects, spaces, etc. - in 1963 as transitory events and installations. The Maciunas Ensemble, founded in 1968, became the source of his experiences with sound and music. The musicians improvise, record, replay and discuss in weekly sessions which continue even today. The Long String Installation, relating the visual and auditory qualities of a building, and bringing together the rules of proportion in music, visual art and architecture in one work of art.