IT'S A HOBBY! Right?
OK a way of life for some of us but let me enjoy my $500 interconnects and believe they make a difference. PLEEEEEEEEEASE!
This capacitance reacts with the output impedance of the source to cause a rolloff of the high frequencies & also contributes to time smear by storing some charge to be released when the signal falls. This happens in part due to impedance mismatches in the source/cable/input impedance of the following componant.
The best setup for best signal transfer is to have matching impedance characteristics throughout the audio path but unfortunately this is not the case with audio without making modifications to all componants in the audio path. Note though if this was done that you would lose 6db sensitivity for each interconnect in series. in other words going from CD to preamp to poweramp you would loose 12db sensitivity. That means you would have to turn the volume up 12db more to get the same volume. The benefits though would be perfectly flat frequeny response with vanishingly low time smear.
I have not done these mods mmyself so I just made cables that would minimize the losses without the mods for matching the impedance. In most cases the high sensitivity losses would make the matched impedance not workable as many people have several componants in series & with 6db loss per jump its too much for most systems.