A couple of words about original dsd sampling rate to be said. Generally speaking, those numbers mean nothing because dsd is a bitstream while the pcm is a byte oriented protocol. PCM requires less fantastic frequences to transmit the same amount of data as direct dsd does. Using DoP mode does not mean that you loose any data - it is still bit-perfect transmission. Dsd sounds better because of different approach to analog-to-digital conversion. Dsd produce more live sound.
Thank Valera for your guidance! i fed my avr with dsd: dsf/dff tracks, good news it manage to play with its full resolution of 5.6Mhz through front usb port. probably usb audio pro could help the next.