How to make a white noise riser before a drop

Put white noise on a track for the last 4 to 8 bars before the drop. Automate a high-pass or band-pass filter to sweep up, and the volume to rise, so it gets brighter and louder. Cut it right at the drop: the short silence makes the hit feel bigger.

How to do it

1. Add a synth playing white noise (or a noise sample) for the last 4 or 8 bars of the build.
2. Put a high-pass filter on it and automate the cutoff from about 300 Hz up to 8 to 10 kHz.
3. Automate the volume from silent to full over the same stretch.
4. Add a little reverb or delay for size, and widen it if you like.
5. End it exactly on the drop, or a beat before it, for a moment of silence.

Why it works

Your ear follows rising pitch and brightness as tension building. A riser tells the listener something big is coming, so the drop lands instead of appearing from nowhere.