I set up both LAN(UPnP) and USB from Soundgenic to my external DAC.
DSD file can be played in "USB mode".
For upnp mode by use of fidata (iOS app), only FLAC file can be played.
When I switch to QNAP(minimserver) by use of fidata app, DSD file can be played.
Any C hings can have some advice in setting of twonky server of Soungenic. Many many many thanks.