OK, so I've been playing bass for awhile, but I've slept on PUP knowledge til recently. I'm looking for some basic sonic characteristics of PUPs I'm less familiar with. I'll start with what little I think I know and hopefully you guys can correct me and/or fill in the blanks. I realize preamps and placement will complicate sonic qualities so lets just stick with the PUPs themselves. Single coil - (the Jazz pup) adjs like thin, nasal, and honky come to mind. It has more of a upper mid freq focus. Split coil - (the Precision pup) adjs like round, fat, thick and warm come to mind. Focused in the lower-mid range. Alright, here is where I think my knowledge is really lacking - Humbucking -I understand that it cancels the hum associated with single coils, but what about the sonic characteristics? Is this even a type of pickup unto itself, or is it a function that can be applied to any style of pickup? Dual coil - ??? Peizo - I know they are usually fixed in the bridge, so I'm thinking they tend to have a thinner, more nasal sound comparable to a single coil, but I'm just reaching here... Anything else I'm missing? Please & thanks!