BRSEQ (File Format)

BRSEQ (Binary Revolution SEQuence) is a sub file format found in BRSAR files from games like Mario Kart Wii. It corresponds to the music data represented in a MIDI-like file, but in binary. Commands that process changes in attributes such as sound generation and volume change over time are described on this kind of file. Since the sequence data is simply a set of commands, sounds are actually producing using bank data (stored in BRBNK sub files) that corresponds to the sound source data.

File Format

File Header

The file starts with a file header that is 0x20 bytes long.

Offset	Type	Description
0x00	Char[4]	File magic. Always RSEQ in ASCII.
0x04	UInt16	Byte-order-mark. FE FF for big endian, FF FE for little endian.
0x06	UInt16	Version number of the file format.
0x08	UInt32	Length of the file in bytes.
0x0C	UInt16	Length of this header in bytes.
0x0E	UInt16	Number of sections.
0x10	UInt32	Offset to DATA section.
0x14	UInt32	Length of DATA section.
0x18	UInt32	Offset to LABL section.
0x1C	UInt32	Length of LABL section.
0x20	End of this file header

DATA

The DATA starts with a header.

Offset	Type	Description
0x00	Char[4]	Section magic. Always DATA in ASCII.
0x04	UInt32	Length of this section.
0x08	UInt32	Length of this header (always 0x0C).

After the header, the sound data is specified. It contains different commands and parameters for the sound.

LABL

Offset	Type	Description
0x00	Char[4]	Section magic. Always LABL in ASCII.
0x04	UInt32	Length of this section.
0x08	UInt32	N = Number of sound labels.
0x0C	UInt32[N]	Offset to label, relative to offset 0x08 in this header.

This is the label structure.

Offset	Type	Description
0x00	UInt32	Offset to the sound data this label uses. Relative to the end of the DATA header.
0x04	UInt32	L = Length of label string.
0x08	String	Label name.

Tools

The following tools can handle BRSEQ files:

• rseq2midi (Converts BRSEQ to MIDI)