Faders not working in Traktor
Faders in Traktor move up and down/side to side, but they don’t affect the volume. Anyone know what the issue is?
Do you use Stem Decks?
No, I’ve never used stems.
Then it got to do something with audio routing.
It would be helpful if you take a few screenshots of your audio device and audio routing settings so we can have some idea of what’s could possibly go wrong 
Thanks for the help, Stewe. I’m still on Traktor 2.6. Just mixing for fun internally on my Macbook. Here are some screenshots.
OK, so the output routing says “not connected” which means that you have to first select your audio device to be able to see output channels coming out of your sound card.
Which audio device would I select if I’m just using my laptop only (no controller, CDJs,etc.)?
Aggregate Device and Built-in Core. Those are the only options I have for Audio Device.
Select “built in” and then check the Output Routing options. Click where is says “not connected” and you should be able to select left and right channel from your computer sound card.
Note that you need to do this for the Master Output.
Got it. Thanks man.
Anytimes!