Just messing around adding nonsense to one of the guitars I made years ago, and in addition to a nice little stereo preamp I am popping in a mini Korg Kaoss Pad (obviously following a bit of a Muse bandwagon, butI quite like some of the milder tone effects it gives..)

Anyway - the input and output buffer stages are annoying me, as I can't quite figure out values of componenets and I want to do away with this daughter board. These have RCA sockets on the back, so I know the components are just resistors and capacitors (left hand end of the board is output, right hand is input) and the number on the two resistors which have a number is 101.

With just a multimeter I can get all the resistor values, but without something in the time domain, how do I work out the capacitors? Or are there sensible values for this sort of thing which should just work, as it is just an audio effects box?