Sound Data (*.sdt)
SDT is an archive format that contains one or many MPEG-2 Audio Layer II (*.mp2) files that are used for sound effects, speech, and music throughout the game. These files are usually uncompressed (in the archive), and the archive format is relatively simple.
File Format
Header
| Size | Description |
|---|---|
| 4 bytes | File count |
For each file
| Size | Description |
|---|---|
| 4 bytes | File offset |
For each file (at offset)
| Size | Description |
|---|---|
| 4 bytes | Header size |
| 4 bytes | Data size |
| 16 bytes | File name (usually null terminated) |
| 4 bytes | Sample rate |
| 4 bytes | Resolution |
| 4 bytes | Sound type (see below) |
| 4 bytes | Unknown |
| 4 bytes | Samples |
| 4 bytes | Unknown |
| n bytes | File data |
Sound Types
- 0: None
- 2: WAV
- 3: “Old WAV” (see https://github.com/ufdada/dk2-tools/blob/master/Formats/Sound/sdt_struct.bt)
- 36: MP2, 64kbps mono
- 37: MP2, 112kbps stereo