If you truly wanted to emulate a CDJ setup, you'd turn the BPM off completely as the BPM detection built into all CDJs is awful.
Traktor already offers the ability to hide all the visual aids, leaving only a tiny stripe waveform and some playback time data - just like you'd get on a CDJ. Besides small things like Brake/Start adjust and Reverse, there's not much missing at all.
Bookmarks