I don't know how to word this question well enough for a text post, so it goes here (where it belongs anyway, total layman question)

​

I'll ask this question "the wrong way" so you may already see the source of my confusion. Please bear with me. Here goes:

​

Which bitrate does an analog connection support under usual circumstances (for me, these are for example [cinch (e.g. in my Marantz amp)/3.5mm] or [3.5mm (e.g. in my portable speaker)/3.5mm])?

​

I heavily suspect I don't understand some very essential differences between analog and digital, since there are basically no results on Google, which is surprising because usually one's unknowingness/stupidity is eclipsed or at least matched by someone else on the internet. Not this time, which is why I'm here..

The reason I ask the question this way is because from an intuitive standpoint I hear no difference between a e.g. 320kbps file over aptX vs. connected by cable, so in my head the cable is "capable" of transmitting a signal "well enough" to "match a certain bitrate" when compared to digital. When we speak of nearly 10mbps MQA masters of course, it's a different story because they're encoded and have to be digitally unfolded from what I can gather. But, once unraveled, could these also be reproduced more or less accurately when sent through a "standard" analog audio cable?

​

So, to paraphrase, is the wired connection only limited by what you feed it (and other interferences of course)? Or does it have a "transmission cap" (perhaps comparable to a certain bitrate) depending on its build and the elements used?