Multiple separate DACs for eDrums

Would it be possible to implement this so I could have separate outputs for different drums? I would want to have kick on one output, snare on another, toms on a third, hi-hat on fourth and so on. What would this mean in terms of compatibility, latency, etc...?
To elaborate, I would have let's say, 8 cheapo DACs connected to the rPi, how difficult would it be to implement custom sound device output per midi note?

Or, another way to do it would be to have one USB audio interface with 8 outputs, and then use these 8 outputs internally.