The Green Music Center at Sonoma State University still isn’t officially open, but a fantastic series of no-cost jazz lectures and performances led by SSU jazz director Doug Leibinger offers the public a sneak peek into both the new hall and the working mind of renowned jazz musicians each Wednesday this fall. Future performers include Lee Konitz and SlumGum, while this coming week sees angular pianist Denny Zeitlin and his acclaimed two-hour presentation, “Unlocking the Creative Impulse: The Psychology of Improvisation.” Both a recording jazz artist and a practicing psychiatrist, Zeitlin bridges the two careers in this musical journey through the synapses of the improvising mind; expect humor, insight, mentally puzzling knowledge and incredible piano playing on Wednesday, Sept. 15, at the Green Music Center, Room 1029. 6539 Rohnert Park Expressway, Rohnert Park. 1pm. Free. 707.664.3203.