Long-time friends and each with a distinct musical profile, pianists Inna Faliks and Daniel Schlosberg have played four-hand and two-piano repertoire by Schubert, Rachmaninoff, Pärt, and Mahler, at the Ravinia Festival, Los Angeles County Museum of Art and National Gallery of Art in Washington, DC, among many others. The duo now presents Alexander Zemlinsky’s transcription of Mahler’s Symphony No. 6 …