I have some (to my ears) muddy sounding pickups in a guitar. I have seen volume bleed caps used to brighten the sound. Also I heard of people using a resistor parallel to the cap. I tried a few different values and settled on .001 uf cap and 47k resistor for the neck pickup, and .002uf cap and 100k resistor for the bridge. It really helped with greater clarity. Has anyone else used resistors in conjunction with caps ? If so what values work the best ?