Silent cap switching

[Toney]

I'm sure it's been done a hundred times... still sometimes I have to remind myself of the dumbest stuff.
This should be the best way to poplessly switch caps.

[Toney]

I've noticed in some grounding arrangements where inputs/caps etc are run to ground, some people use a small value resistor.

Not sure what it's achieving>>>>>>>>anyone wanna fill me in??

[R.G.]

Capacitors pop because they have a different DC voltage at the instant of switching than the circuit they're switched into.

There are two ways to switch them silently.
(a) switch them slowly, with something like a JFET or an LDR. The LDR way is like using nuclear weapons to kill flys. The JFET works, but is complicated. Slow switching leaves the pop there, but it happens so slowly that it's not carried through the circuit or heard in speakers if it does get through.
(b) use high value resistors in series with the caps to hold them at the correct DC value all the time. To switch them in, short the resistor which is in series with the cap.