… The seasoned pianist Richie Beirach—an American who has been living in Germany for many years—appeared in his intriguing duo project with violinist Gregor Huebner, a German-bred player based in the States. Odd as it sounds, the clean, corporate and cavernous ambience of the the Volksbank Haus lobby made for an inviting venue during their intimate, but sturdy dialoguing music. Material-wise, the pair moved seamlessly from the music of Spanish composer Frederic Mompou to freshly respun standards—“My Romance,” “You Don’t Know What Love Is,” a soul-fired take on John Coltrane’s “Transition.” Original turf included Beirach’s chamber-ized “Testament,” Huebner’s haunting, tonally and timbrally clenched 9/11 homage “Ground Zero” and Beirach’s sweet treat of an encore, “Sunday Song,” a perfect grace note to end the Sunday evening set.