WARNING, PERFORMING THIS MOD WILL VOID THE WARRANTY OF YOUR VOLCA BEATS AND MIGHT POTENTIALLY DAMAGE IT, SO PROCEED AT YOUR OWN RISK!
The Korg Volca Beats is a really cool affordable analog drum machine, but having all the instruments summed into one output is a serious limitation. Luckily, Korg made it relatively easy for us to tap all the instruments off the circuit-board and feed them to individual outputs:
The tools you need are:
The video below demonstrates how it looks like, what it sounds like and how I've done it.
Open up the battery cover and take out the batteries.
Pry off the two buttons of Stutter Time and Depth
Now you can take out all large screws. (You can leave in the smaller screws, as they just hold in the battery compartment.)
Carefully open the enclosure making sure you don't stretch the battery and speaker wires too much. I actually had to re-solder both speaker wires as they just broke off from opening and closing the enclosure too often. Not such a big deal, but beware of it.