File Type - Wwise Stream - bitsquid_dt/dtmt

Seems to be just a pointer into a corresponding .stream file in data/.

A file header will look like this

uint32 lang = 0x0;
byte external = 0x0;
uint32 size = 12;
byte unknown = 1;
uint32 len_data_file_name = 31;

extra_file will then contain the path of the .stream file.

//------------------------------------------------
//--- 010 Editor v12.0.1 Binary Template
//
//      File: dt_wwise_stream.bt
//   Authors: Lucas Schwiderski
//   Version: 
//   Purpose: 
//  Category: Darktide
// File Mask: *.wwise_stream
//  ID Bytes: 
//   History: 
//------------------------------------------------

// Could be the version, but 27 different versions of a file that only contains an offset seems unlikely
uint32 unknown1;
Assert(unknown1 == 0x1b);

// Offset and length of the section within the `.stream` file.
// Since all `.wwise_stream` files seem to get their own `.stream` file, `offset` always ends up being `0`,
// and `length` always ends up matching the `.stream` file's size.
uint32 offset;
uint32 length;

The .stream file contains a raw RIFF container, no extraneous fields. However, while the contained data is WAVE as per the type field, it uses an audio format that even ffmpeg cannot understand. The wFormatTag of the struct WAVEFORMATEX is set to 0xFFFF which indicates an experimental/in-development format that has not been standardized or registered with Microsoft, yet.

ww2ogg can be used to convert these into a usable format.

Wiki

Building the source code
Obtaining the Oodle library

DTMM

Installing mods
Register DTMM as handler for Nexus downloads

DTMT

CLI Reference
Building your first mod
Migrating from loose files
dtmt.cfg Reference
Murmur hashes and dictionaries

Reverse Engineering

Getting Started
Sound
Textures

File Types

Status
Bundle
Bundle Database
Texture
Material
Strings
Package
Wwise Event
Wwise Stream
Wwise Bank