It probably doesn't benefit us, from an evolutionary prespective. Our ability to listen to and appreciate music is probably a byproduct of needing a well developed system of hearing subtleties in sound. For example, it is certainly in our interest to be able to hear emotion in another person's voice. I think it's likely that whatever capabilities our brain developed to be able to survive were general enough for us to use them for other means.Mental wrote:it's the one thing i really just don't understand about humans from an evolutionary standpoint. i mean, what good does it do us to hear music from a pure biological standpoint? birdsong is pretty and stuff, but it's just so strange.
I think this general idea is true for a lot of things that we are capable of that don't have an obvious evolutionary benefit. Why, for example, do we find little furry creatures cute? All other animals are potential food. Wouldn't it be better if we never had emotional attachment to potential food? But I don't think that we find animals cute because that benefitted us. I think it's a sort of "misfire" that results from finding babies and other humans cute. (It's obviously evolutionarily beneficial for us to find babies and other humans cute.) I think that whatever criteria we have for determining "cute" is general enough that other mammals wind up qualifying.
A good book that touches on some of this is <a href=http://www.amazon.com/exec/obidos/tg/de ... 507846>The Selfish Gene</a> by Richard Dawkins.