better grounding, or cleaner grounds can fix a lot of the impression of ’grunge’ in some digital based audio systems. Not always, but it can happen.
same for purely analog systems. the ground and it’s qualities can be and is important. This can be a problem in apartments, high rises, places with bad grounding dry grounds around the house in situ, or dried out oxidized ground rods, etc.
@teo_audio How do planes and satellites work then?
They do not have access to ground rods, and many seem to use use digital systems.