Comment 1 for bug 1976192

Rekordbox control vinyls are supported since https://github.com/mixxxdj/mixxx/pull/4597 was merged.
So these are selectable in the preferences in Mixxx main branch (currently 2.4-alpha).

If you like to test it you can install 2.4 (still considered 'unstable') from
https://mixxx.org/download/#testing
For info on how to back up your settings + database see
https://github.com/mixxxdj/mixxx/wiki/Testing