Native Instruments traktor kontrol s5 Manual page 139

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Press Display Button 3 (TAP) four times in sync with the playback.
The tempo is calculated and the Beatgrid adapts to the tempo.
Tick (Audible Beatgrid)
The Tick works like a metronome, giving you an audible pulse for every beat. Align the Tick
and the beats in your track for perfect sync.
You can only hear the Tick on the CUE (headphones), not the MAIN (audience).
Using Your S5—Getting Advanced
Working with Beatgrids
TRAKTOR KONTROL S5 - Manual - 139