When using JACK for Windows, it is possible to route audio from one application to another.
This video is a followup video to "Routing Traktor to Ableton" and is about sending all 4 decks from Traktor to Ableton Live and sending audio from Ableton Live to Traktor, all through JACK for Windows.
Related videos:
Routing Traktor to Ableton using Jack for Windows:
• Ableton Tutorial: Routing Traktor to Ablet...
Using JACK for Windows:
• Ableton Tutorial: Using JACK for Windows w...
Using a Midi Clock to sync Ableton and Traktor will be handled in a follow up video.
People using Ableton 9 - 64bit need to manually register the 64 bit JackRouter.dll.
Visit this page to read up on how to do that:
http://jackaudio.org/jack_on_windows
Very important: Run the command from an elevated prompt (right click cmd.exe and select "Run as Administrator").