Could it possibly be the nothingness between notes? An analogy that comes to mind for me is as a child visiting my grandparents in the middle of nowhere Oklahoma on a 1000 acre ranch, no power and no indoor facilities, if you get my drift, looking up into a perfectly dark sky with the stars sparkling hearing the crickets clicking in another wise dead background.
Black backgrounds and such
So I’ve been reading audio reviews for 25 years but sometimes the descriptions etc used still don’t make sense or I question what they are really trying to say. What is a black background for example? Is it the silence that exists when my system is off ? Curious if there is some glossary or explanation or even better an audio recording which would provide examples of one descriptor vs another. It’s kind of like wine but at least when someone says has notes of blackberry I have a reference point!