The first single from his forthcoming album Philanthropy, the six-minute “Nature” from Hauschka is a prime nominee for the gallery space playlist. The alter-ego of Academy Award and BAFTA-winning German composer-pianist Volker Bertelmann,  Hauschka is adroit at blending arch-conceptual experimentalism and pop-ambient soundtrack work. His elegiac score for last year’s antiwar epic film All Quiet on the Western Front snagged him …