XeNTaX

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Note: if the version number is 3, then all values in this file are big-endian. If the version is 5, then all values are little-endian.

Header:
byte {1} - Version number (3 or 5)
byte {3} - Unknown
byte {4} - Unknown
uint32 {4} - Unknown
uint16 {2} - Unknown
uint16 {2} - Number of extra uncompressed samples before the data (always 10)
int16 {2} - First left sample for decompression
byte {1} - First left index for decompression
byte {1} - Unknown
int16 {2} - First right sample for decompression
byte {1} - First right index for decompression
byte {1} - Unknown
byte {4} - Unknown

Extra Uncompressed Samples:
if the sound is mono:
int16 {Number of extra uncompressed samples * 2} - Uncompressed samples

if the sound is stereo:
int16 {Number of extra uncompressed samples * 4} - Uncompressed samples

Data:
 byte {?} - Compressed data

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Little-endian

uint32 {4} - Signature (2)
uint32 {4} - Number of Layers (always 3)
uint32 {4} - Total File Size
uint32 {4} - Unknown (always 20)
uint32 {4} - Unknown (always 1104)
uint32 {4} - Average Block Size (always 361)

For Each Block: {
	uint32 {4} - Block Index (begins at 1)
	uint32 {4} - Unknown (always 20)
	
	For Each Layer (Chunk): {
		uint32 {4} - Layer Chunk Size
	}
	
	For Each Layer (Chunk): {
		uint32 {Layer Chunk Size} - Chunk of an Encapsulated UbiSoft Old Simple Stream
	}
}

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Little-endian

uint16 {2} - Signature (8)
uint16 {2} - Unknown
uint32 {4} - Unknown
uint32 {4} - Number of Layers
uint32 {4} - Number of Blocks
uint32 {4} - Number of Bytes after This to the Headers
uint32 {4} - The Sum of (Number of Layers * 4) Plus the Header Lengths
uint32 {4} - Average Sum of Chunk Data Lengths

For Each Layer: {
	uint32 {4} - Layer Header Size
}

For Each Layer: {
	uint32 {Layer Header Size} - Header of an Encapsulated Stream (PCM, UbiSoft Simple Stream, Ogg Vorbis)
}

For Each Block: {
	uint32 {4} - Signature (3)
	uint32 {4} - Number of bytes from the start of this block to the next block, 0 if no more blocks
	
	For Each Layer (Chunk): {
		uint32 {4} - Layer Chunk Size
	}
	
	For Each Layer (Chunk): {
		uint32 {Layer Chunk Size} - Chunk of an Encapsulated Stream (PCM, UbiSoft Simple Stream, Ogg Vorbis)
	}
}