Suspicion confirmed.
3 seconds sound clip from the Dune (1984) movie soundboard.
You can hear this line at 02:35:31 in the Blu-ray version of the movie.
Quote context
[...]
- We will set down on the pyramid's landing facility.
- The Emperor's had Rabban seized.
- Stand by the main control room.
- When the storm hits, set off the atomics.
- I want an opening through the entire shield wall.
[...]