@sns
It seems to me that the vocal excercises you outline might work to help "voice" your listening room rather than the component system.
When I go to a dealer or a show I always carry with me, in one form or another, some music files with which I am very familiar. It is easy and inevitable that I would compare what I am hearing there to what I hear at home. It requires no special aural memory to do that. I suppose we have all done that. It may, though, require some insight to separate the different room from the different components. I believe someone here has written of taking his Musetec to a dealer in order to focus more carefully on a different component of interest. IMO that is much the same, and requires similar aural memory skills, when visiting a concert. In fact, avoiding that comparison is virtually impossible--for me.
IMO the Musetec is agnostic when it comes to silver cables. It probably has much more to do with the rest of the system.
You are correct when you say that the Musetec is voiced wonderfully. I would say, accurately. I do not want a component to be "warm." That would be coloration, a distortion. The DAC should be neutral. A cello, piano or bassoon can sound warm and the neutrality of the DAC should let that warm color of the instrument through. I think this is a common misunderstanding of what a good component should accomplish.
It is all too common that components that measure very well will reproduce instruments and voices as flat and colorless. This forum, like others, then find their owners asking for recomendations for amps/preams/DACs that sound warm. One way this often happens is as a request for recommendations of solid state units that sound like tubes.
@dbb
"The Serene review seems impossibly contradictory. More transparent than the Benchmark, but yet more engaging and musical. I would need a lot more information in order to understand what exactly their reporting."
As i wrote earlier, reviews today are "simply expressing personal likes and dislikes in audiophile jargon." Forget asking for more; that’s what they do. Not to mention extolling the detail in the sound of a dentist drill. And with a song he gets a lump in his throat. Who knows? It could be Covid-19!