Reply to Connecting an APC40 to a VCI-400 EGE

Hi everyone. I just got a VCI-400 EGE and I am having a blast with it. It is so versatile and just plain fun. I read an article on this website that described integrating Ableton and Traktor together:
http://www.djranking s.com/2012/09/3...eton-together/
I'm trying to bridge my APC40 to my VCI-400 EGE, which is connected to my macbook pro and I'm not sure how to do this. Do I need to purchase an additional sound card? Thanks! I really appreciate your help.