An audio cable is a passive component. And like other components, it's job is to neither add nor subtract anything from the music program. On a substantially good system, a cable can improve the program only by keeping spurious outside interference to a minimum. A cable is completely passive.
On a good system, any "work" done by the cable will be very subtle at best. Our ears and brain have very short term audio memory. So, unless you have an AB blind test switch as a permanent part of your system, in the time it takes to switch out a set of cables, you will have lost the ability to accurately recall the exact sound of the previous cable or any subtle changes that the new cable "provides. "
On a good system, any "work" done by the cable will be very subtle at best. Our ears and brain have very short term audio memory. So, unless you have an AB blind test switch as a permanent part of your system, in the time it takes to switch out a set of cables, you will have lost the ability to accurately recall the exact sound of the previous cable or any subtle changes that the new cable "provides. "