Séance Filming Locations

Séance uses some of the interference patterns and other patterns and images Belson created for the historic Vortex Concerts at Morrison Planetarium in San Francisco (1957-59), though this film was not actually screened at the concerts, nor were all these images used there. The film was completed after the Concerts ended. Belson had asked his Vortex collaborator Henry Jacobs to compose a soundtrack for this film, but this didn't occur. Instead Belson used a soundtrack by Pierre Schaeffer, "Etude aux Allures." This composition was performed at the International Festival of Experimental Music at the 1958 Brussels fair, billed with "Visualization by Jordan Belson."