In a small detour from his work as a solo producer, San Francisco producer Dave Aju adopted a group of similarly talented musicians and vocalists to join him as the Sol Percussion Ensemble. The group convened on two tracks, “Flexa” and “Vibra,” for a new EP called Two Tone. Both songs are their own kind of warped techno-and-jazz-inspired musique concrète, each with its own focus on a single percussion instrument. As the titles infer, “Flexa” features the flexatone, and the vibratone is the centerpiece of “Vibra.” Two Tone comes out physically on June 28, and July 5 on digital formats, via Circus Company.