 Soon after Vortex, the film acquired its soundtrack, when Jordan Belson synchronized it to an excerpt from Henk Badings’ "Cain and Abel".This did not occur at the Morrison Planetarium Vortex Concerts, contrary to popular belief (Keefer, 2008).Analogue computer equipment developed by brother John, allowed James to complete "Lapis" (1966) in two years, when it might have taken seven years otherwise.