Mental madness-or-band pass filter on guitar face

[Matthew Sanford]

Ok, this long madness...I've been thinking long on using a capacitive sensor for the LPF set on the guitar in a convenient place (above the bridge for deeper palm mute chug?) but was trying to figure a magnetic pick to influence an inductor for the hpf. Really wanted to strum with upstroke to bass and down to treble, but...madness. Now I'm thinking an FSR for hpf, you'd have to press it, maybe mounted on the back to press on your leg.

So, was originally going with passive, but may be better with a tl072 to buffer before and after with a 9v, I guess like a green ringer.

This is just mental madness at this point, but any thoughts, things to avoid or seek in it? Of course this will be diy cap and FSR, so I'll get the highs and lows before choosing the others, maybe a resistor in parallel and cap in series to tone down those ranges...

[GibsonGM]

Gonna build a preamp to come before the filter?  Maybe you should, just to have a nice clean signal to work with before altering it...so it would be like having active pickups with whatever band filter you come up with.

[Matthew Sanford]

I was just thinking voltage follower set up before and after with a tl072. Last night I was thinking if they're stacked them you'd get a nice mid scoop...or maybe hold the foam in the pick hand to squeeze when needed. I'll have to try it, passive first then active, placement can always change