Great news, got latest 4.4.4 firmware and latest Walkman App and I can confirm that it is possible to playback Direct Stream Digital Files (DSD) up to highest possible quality. Just ensure that your DSD files have that .dff suffix and it just works like a charm! I am estonished, pure audiophile playback (BTW: I use the MDR-1R headphones).
Compliments, SONY !
