DDJ SX3 Can’t precue. Some channels will light up the cue button, some flash, but none will make any sound out of the headphones to pre cue.
Hi
Thank you for getting in touch.
Do you accept the controller device settings dialog window when you connect the SX 3 to your Mac?
The device is being used in external mixer mode and natively supported. Please make sure it is setup correctly as pre cueing is treated exernally by the device itself.
If you have any question please contact us right away via support@algoriddim.com
Cheers
Lukas E.
sorry you are also having this problem.
it really seems like the new Catalina update broke native support on almost all of the DDJ controllers… i hope the lack of a response is because they are working on an update that will fix everything 
hand in their bro. try and use the terribly Serato in the mean time… i know, serato sucks. funny how such a huge brand name has no idea how to make a visually appealing DJ software but yet this no-name company makes the perfect user experience however so much troubles with the back end… they should just merge 
:D
