Octatrac. Machinedrum to pc connect

Hey
I just bought an octatrack and machinedrum and a virus c and a DSI mopho.
What is the corect Way of connecting Them?
And if i want to connect with pc, would i need A midi interface?

Hi,

You already posted this question in another thread:
http://www.elektronauts.com/t/connecting-gear/11705/96524