Causal Efficacy (NIU jazz band) by Brent Michael Davids published on 2024-03-11T16:33:34Z 04:40. Causal Efficacy" performed by NIU Jazz Ensemble, Northern Illinois University, DeKalb, IL; 1983. Ron Modell: directing. Copyright ©1983 Brent Michael Davids. All Rights Reserved. Genre Jazz & Blues