The Dune 2 sounds that they created:

Fremen Language and Sounds: Collaborated with linguist David Peterson to develop the Chakobsa language and background lines for Fremen characters.​

Harkonnen Voices: Designed alien vocalizations, including chants and aggressive tones for arena scenes, using punk and metal vocalists.​

Unique Alien Languages: Crafted sounds for the Bene Gesserit and Sardaukar cultures, ensuring distinct aural identities.​

Crowd Tracks: Recorded loop groups in Wellington for large-scale scenes, layering 70 voices into 70,000.​

Environmental Sounds: Enhanced sand effects and atmospheric noises, blending realism with sci-fi elements.

How did they make these sounds?

The sound team for Dune: Part Two used several innovative techniques to capture the sandworm sounds:

Microphone in mouth: Sound engineer Mark Mangini put a microphone in his mouth and inhaled vigorously to create the sound of a sandworm swallowing a spice harvester.​

Underwater recordings: They used hydrophones (underwater microphones) in Death Valley to record the sound of moving sand.

Layered organic sounds: For the worm's mouth opening, they combined multiple processed human and animal noises.

Natural materials: They recorded creaking tree bark and twisting vines for the worm's movement sounds.

Desert recordings: The team traveled to Death Valley to capture authentic desert sand sounds.

Fake Documentary Realism (FDR): This technique aimed to make the sounds feel organic and acoustic, as if recorded by a documentary crew on Arrakis.