I am trying to route 4 channels from traktor into abelton , I have got as far as setting the ports in Jack osx but in the send ports only live is showing and in the receive ports both are showing , not sure what to do tried a couple of times but keep getting stuck at this point.
@neilmcm I had the same issue but solved it…simple after a good nights sleep.
In Traktor you have to make sure you select “JackRouter” and NOT “jack audio device”.
Traktor will use jack outputs 1-8 as external routing sound card
In Ableton set the input sound card to Jack and the output to DB4
Ableton will use the DB4 as the output sound card to whatever channels you wish on the DB4
TBH I gave up on Jack after a few attempts and went with soundflower instead - it just “worked” without any messing around Jack just failed for me and couldn’t be arsed trying to make it work.