This s a great post...I'm really a novice trying to better understand the intricacies of damping and isolation, etc. My takeaway is that there's no one solution, but rather a combination of solutions dependent upon one's system and environment. A lot is devoted to reducing component internal vibration, which makes sense to me because its the closest to the signal path, sometimes actually in the path.
So does room acoustic treatment come into play, in terms of reducing airborne vibration that can find its way into the audio signal? Can this vibration enter the cable or component and disrupt or alter the audio signal?
Probably a really stupid question, but like I said, I'm trying to learn first - spend later.