Hi,jhergonz wrote:I'am no expert, but maybe this is the reason why we must use shielded wire when not mounting the I/O jacks and pots when building high gain distortions, and maybe your fingers act like a ground(I'm not really sure, so please correct me if I'm wrong.)
I'm no expert too, but here's my 5 cents:
Yep, human body can act as a filter, effectively attenuating certain frequencies.
But more commonly it introduces additional noise to the signal line, than filters it.
You can touchy-touch a tip of 6.3 plug of a cord plugged into working amplifier or a pedal and experience added noise.
There is also a bunch of stuff, like multipath fading, that can be related to one's body position relative to the device and bunch of other stuff that I don't want to go into .
The whole thing with whine and ocillations in this pedal is very strange.
High freq. whine can be intruduced by build-in power booster.
Oscillations are more common to occur due to capacitive coupling between signal lines.
As for shielding, it's more to mitigate electric interference (more commonly 50hz hum from AC heaters in tube amplifiers, tremolos with high swing and poorly designed old circuitry).
But, there is really nothing in this pedal, that can generate electric field that can possibly be a source of a feedback and cause oscillations due to non-shielded wires.