The guitarist Mike Stern and the drummer Dave Weckl still traverse the all-but-forgotten road of rock-jazz fusion. Stern broke through as a member of the rock band Blood, Sweat & Tears, then worked in fusion groups led by Billy Cobham, Miles Davis and Jaco Pastorius. He errs toward theatrics, but has the shredding talent and dripping tone to back it up. Weckl, who rose to prominence in the 1980s with the Chick Corea Elektric Band, is one of the most technically stupendous drummers in the world. Most fans of fusion and jam music connoisseurs hold this in high regard. Those who are disposed to ask questions like, “Well, what does the music mean, what’s it saying?” often find little to hold onto here beyond gestures of vigor and pyrotechnics.