I am having fun with this new setup.
Synology EDS14 has two USB port - use one for storage, another one for connecting to your USB DAC (DAC-10, DAC-9, IDA-8, IDA-16, Encore mDSD).
You can use Audio Station to play local music, or stream from another NAS (I have two other media servers running for test - JRiver Media Center and Synology 2-bay model).
You can use the remote DS Audio app from mobile device to control it.