So I bought a Larrivee LV-03E (Which I would recommend everyone to go out and play.. it's sweet) But it has the above mentioned L.R. Baggs Element Onboard System w/ Notch and I was wondering what precisely the "Tune" knob does. It says, "Use the rotary knob to fine tune the frequency that you add or cut between 680 Hz and 2kHz." I was wondering if you have any suggestions on what I should leave it at or just any general info on it. Thanks!