USB output to laptop not working(?)

[JonathanAltd]

I bet it's the security settings in OSX.

If you go to the Apple menu -> System Preferences -> Security & Privacy
Click the padlock and enter your password to unlock the panel.
Open the Privacy tab and in the left hand pane  scroll down to Microphone and select it.
In the right hand pane that'll light up, scroll down to Audacity and click on it to enable it to use the mic input.
Note although it's labelled Mic, it's more about enabling Audacity to use CoreAudio, and this is where you do it.
Then, restart Audacity and you should be good to go.

/P.

That's sadly not it, I also tried upgrading to Catalina, PRAM reset, running it on strictly the master without the slave. The Devialet USB 2.0 doesn't detect any sound on both Audacity/VinylStudio.