Laurel and Doug Epps are debuting their first documentary, &ldquo;Soul Resonance&rdquo; in the Homer Theatre&rsquo;s DocFest this week. 
The first showing of Soul Resonance is 8 p.m. Saturday, with a marimba jam to follow.   In conjunction with the local marimba bands,  Zimbabwean musician Tendai Muparutsa will perform. The second showing will be 4 p.m. Tuesday. The Epps will be at both showings to meet people and answer questions. 
&ldquo;There is a deep spiritual aspect to the ancient music that seems to resonate with the souls of people who hear it,&rdquo; Laurel said. 