I would like to know if anyone here has had the experience of, let's say, adding an interconnect that is not necessarily the best available to them, only to find out that it offered more musicality than the superior product...

Let's take the distributed capacitance of a longer RCA cable, for instance... If you have high definition equipment, and are playing a wide range of program material, it might behoove you go with a higher Pf per foot rating, so as to change the overall presentation of your system...

I guess a good word would be synergy here...

At any rate, I've experienced this more than once, the latest time being when I was running streaming audio from my computer... The lesser quality cable definitely gave a better presentation than the higher quality one... ???... (m.)

Long cables have a higher pf which translates to high frequency roll-off. Guitar players use the "vintage" style cables to get that high end roll off for overly bright or harsh systems.

In the streaming instance, it's probably helping to filter out some of those compressed jaggies on the high end.