There are a variety of ways of ripping CDs to a NAS and having the NAS show up on the Naim App as a source, I believe.
But as an owner of an NDS; like the OP, I would like to update the digital tech in my system, but still use the superb Dac (IMHO) in the NDS. The NDS will always be part of my system, unless I spring for an ND555.
Since the Innuos Zenith Mkiii is about $5k in Canada, and even the Zen Mini is $2k, I have been thinking that an ND5 XS2, which can be had for $5k cad new or around $3500 pre-owned, would be the perfect upgrade to the new tech.
But again, like the OP, I want to be certain of the connections. Surely I can connect a Digital output from the ND5 XS2 to the Digital input on the NDS, and play the new digital sources thru the Dac in the NDS, and also have it as a choice on the Naim App, if that’s necessary.
Any clarification on this would be greatly appreciated, and may even help the OP.
Thanks, and cheers.