Hello Hollywood Shak,
Scratch Live can read midi data.
As long as your Korg is sending midi info then SSL should be able to read it.
Check out this article regarding midi mapping devices to SSL -->
serato.com
You will, however, still need one of the Rane hardware devices in order to stream audio into the mixer and use our program.
You will not be able to stream audio from SSL directly into your Korg via usb like you can with the TTM57 or new Sixty Eight.