getting sounds from other programs into MSP

Hi,

This may be a rather dumb question, but I am a Jitterist with little experience on the MSP side of things. I'm wondering if there's a way to get all sounds currently being generated by my computer into MSP. Basically, I'm building a visualization tool and want to play songs in iTunes and analyze them with fiddle~. I'd also like to be able to get sound information from another computer, for instance if my patch could be driven by someone djing on another laptop. I haven't looked at the OSC objects. Perhaps it can be done with those?

Thanks,
Zach