Sorry that took so long .
Obviously DAC, AMP and LSP are key to what you are listening .
The toslink is often a good way of isolating high frequent digital interference from the rest audio world.
Because of that I use little plugs in between the network cables of each source for galvanic isolation.
Netzwerkisolator MED MI 1005
artistic-fidelity.de/index.php/de/giso-isolator
Also all components are in one place with one switch (ubiquity) and nice network cables (audioquest) and each source (DAC,nucleus+ and the Mac mini as the video source to the TV) has his own network isolator …
But when that is done down to the cable, the experiments with digital music files begins .
My people rejected the LINN SW on the iPad because it was not easy to use, it did not take playlists from iTunes and looked ugly .
So we started with SONOS, connected with Toslink to the LINN DSM, after purchasing ROON we changed the SONOS to a Mac Mini as a ROON Core, also connected via Toslink to the LINN DSM .
Then better USB Cable to the extern USB HDD, better Toslink Cable to the LINN Streamer .
All the time, the hifi system itself was unchanged .
So yes, the nucleus+ made the difference .
So latest, I copied the files from a WD myCloud external to a 4TB SSD inside the nucleus+, that boosted the sound again very much .
Today I tested the ROON DSP, thats sounds very nice, so from today the AIFF/FLAC files @16bit/44,1kHz are served to the LINN DSM @24bit/192kHz .
Have fun, rgds hpb .