Place it just before a reveal or a scare, then follow it with the FNAF jumpscare scream for the payoff. For a slower build, open with the danger alarm, let this warning hold the middle, and save the scream for the final shot.
About this sound
This four-second clip delivers the warning 'Don't touch that dial' in a low, measured voice that sounds like a broadcast interrupted mid-sentence. It feels tense, watchful and faintly threatening, as if something unseen is listening just off-screen. The line comes from P.T.