It isn’t jazz, exactly, though it lives in a jazz environment, nor is it classical. It’s not folk, rock and roll, or sacred music, either. Yet American accordionist Will Holshouser and Dutch trumpeter Eric Vloeimans combine elements of all of these and more in their compositions—sometimes all in the same piece—to articulate their compositional objectives. In the process, they have created sui generis music that is at once lyrical, playful, and deeply felt. The two will bring their music—and likely their new album, Two for the Road—to the Outpost on Tuesday, September 27, as part of the 16th annual New Mexico Jazz Festival.