A BRASD file (Binary Revolution Animation Sound Data) contains information related to how certain objects produce sound based on their CHR0 animation. In Mario Kart Wii, they always appear in a ./brasd/ subdirectory from a course.
File Format
This is the structure for the BRASD header.
| Offset |
Type |
Description
|
| 0x00 |
String |
File magic. Always RASD in ASCII.
|
| 0x04 |
UInt16 |
Byte order mark (BOM): The value is always 0xFEFF. If value 0xFFFE is read, then the false endian is used. Mario Kart Wii uses nearly always big endian (bytes 0xFE,0xFF).
|
| 0x06 |
UInt16 |
Version number of the file format. Always 01 00.
|
| 0x08 |
UInt32 |
Length of the file in bytes.
|
| 0x0C |
UInt16 |
Header size. Always 0x20.
|
| 0x0E |
UInt16 |
Number of sections. Always 00 01.
|
| 0x10 |
UInt32 |
Offset to the DATA section. Always 0x20.
|
| 0x14 |
UInt32 |
Length of the DATA section.
|
| 0x18 |
End of this file header
|
DATA
The DATA section starts with a section header.
| Offset |
Type |
Description
|
| 0x00 |
String |
Section magic. Always DATA in ASCII.
|
| 0x04 |
UInt32 |
Length of this section.
|
| 0x08 |
UInt32 |
Number of frames in corresponding animation.
|
| 0x0C |
DataRef |
Reference to Event Table.
(Offset relative to 0x08 of DATA header).
|
| 0x14 |
End of this file structure
|
Event Table
| Offset |
Type |
Description
|
| 0x00 |
UInt32 |
N = Number of events.
|
| 0x04 |
Frame Info[N] |
Array of events.
|
Frame Info
The Frame Info structure contains information about the frames and the second event structure contains information about the sound.
| Offset |
Type |
Description
|
| 0x00 |
Int32 |
Start frame.
|
| 0x04 |
Int32 |
End frame.
|
| 0x08 |
Byte |
Frame flags.
| Value |
Description
|
| 0x00 |
Type. 0 = Range, 1 = Trigger.
|
| 0x01 |
1 = End frame is infinitely large.
|
| 0x02 |
1 = Start frame is infinitely large negative number.
|
|
| 0x09 |
Byte |
Loop offset.
|
| 0x0A |
Byte |
Loop interval.
|
| 0x0B |
Byte |
Reserved.
|
| 0x0C |
DataRef |
Reference to Sound Event.
(Offset relative to 0x08 of DATA header).
|
Sound Event
The Sound Event structure controls the info about the animation sound and stores a reference to a BRSAR sound effect.
| Offset |
Type |
Description
|
| 0x00 |
UInt32 |
Option flag. Unknown meaning.
|
| 0x04 |
UInt32 |
Sound ID. Always 0xFFFFFFFF.
|
| 0x08 |
DataRef |
Reference to null-termined ASCII string that refers to a BRSAR sound.
(Offset relative to start of this structure).
|
| 0x10 |
Byte |
Sound volume.
|
| 0x11 |
Byte[3] |
Reserved.
|
| 0x14 |
Float |
Pitch.
|
| 0x18 |
UInt32 |
Reserved.
|
| 0x1C |
UInt32 |
User Parameter. Unknown meaning.
|
Data Reference
The Data Reference structure is used to point to other data types.
| Offset |
Type |
Description
|
| 0x00 |
Byte |
Reference type. (0 = Address, 1 = Offset).
|
| 0x01 |
Byte |
Data type. Always 0x00.
|
| 0x02 |
UInt16 |
Reserved.
|
| 0x04 |
UInt32 |
Value.
|
Tools
The following tools can handle BRASD files: