Andrew Lamprecht
Minion of One
Re: Bout to buy some low capacitance guitar cable
+1.
You could add a tone control between the output jack tip and the output lug on your volume control or switch. It will do exactly the same thing. Just use a cable with no significant capacitance (very short ones will work - you basically want the capacitance reading to be a low amount of picofarads - keep in mind the meter's margin of error).
It still sounds like snake oil to me, and a buffered output already does the job. What the buffer does is lower the output impedance, reducing the effect that capacitance in cables would have on higher impedance signals, such as an non-buffered outputs. Also, the capacitance usually only affects really long cables, or coiled cables (the wire length is greater than straight cables of the same "advertised cable length", due to the wire being compressed in a coil), as the cable capacitance will only affect frequencies out of the human hearing range. As the cables get longer, and more capacitance is present, the problem of signal degradation arises.
+1.