I'm sure there is, but at a hefty cost I bet.

I wondered this myself a few years back and I couldn't find anything to seperate the instruments/voice. I think it's near to impossible without some razoo piece of equipt., but trying to seperate them would be difficult.

For a guitar for example, you don't know how many tracks they actually covered in the studio. They could have went over a guitar track a dozen times, in seperate channels probably, and more than 1 channel. The guitar might be really present on one channel, but only heard in the distance on another channel.

Try searching on the net a bit because I'd be curious if there is one available for retail.