Bridge Materials?

[skrowl]

Can somebody list in "dummy terms" what advantage differant materials used in the bass plate of a bridge and the saddles actually gives you?

[XylemBassGuitar]

Supposedly, aluminum bridges are brighter sounding with more mids to highs. Brass, while being heavier, lends more to the bass end of things.

I've got a little experience building with wooden bridges as well. They seem to give basses a more "woody" natural tone (especially on fretlesses). The harder the wood the more "punchy" the tone gets too.