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|Jazz Jackrabbit Sound format:                                                             |
+==========================================================================================+

Jazz Jackrabbit sounds are stored in the SOUNDS.00X files. SOUNDS.000 is used by the game as a 'base' file, when Jazz is playing levels the sounds in SOUNDS.00X are added to this. This is done by the header in SOUNDS.00X pointing to sounds in SOUNDS.000 (by using a special pointer) as well as having references to their own sounds. Thus SOUNDS.000 is the largest file, with other sound files often being little more than empty headers.

Jazz reads sound files by first checking the file signature, then getting an address from the last 4 bytes of the file. This points to the sound list, which is read, pointing to the various sounds in the file.

Sound list pointers come in two types, normal (Poitning to a sound in the file.) and  negative (Pointing to a sound in SOUNDS.000)

Raw sound data: This is exactly like a wave file, being composed of 'samples' much like those used in ProTracker Studio Module (PSM) music files. The data consists of 1-byte signed entries and also sometimes contains a sample header for the samples to be extracted back to the original files, but this is treated as sound data by Jazz and is unimportant.

Oddly, for SOUNDS.001 and onwards (2,3,...) any sound over 15 that refers to SOUNDS.000 refers to it 346 bytes further along than it should. This appears to relate to the header structure somehow, but I don't know exactly. Also sound 15, if it refers to SOUNDS.000 will have the reference value of sound 15 in SOUNDS.000, *even if that sound is not the same as the sound that it refers to*


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FILE STRUCTURE:
0    4    Filesig File signature, 'sfx' + $1A
4    ?    Data    Raw sound data
?    18x  Snd lst Sound list entries, there are 32 of these
...
..
.
+288 4    Lst loc Sound list location in file


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Sound list entries:
0    12   Name    Sound name, this is the name of the sound, used by levels and such to play the sound,
                  padded with nulls.
12    4   Loc     Sound location in sound file, data is read from here. If this value is larger than $7FFFFFFF
                  then is the 'negative' of the value and refers to the location of a sound in SOUNDS.000
                  (Thus the first entry in most SOUNDS.00X is $FFFFFFFC, pointing to 4 in the .000 file.)
16    2   Len     Sound length, in bytes.
------------------------------------------------
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Sound data sample header (If present):
 1    1   Start   $01, start of header
 2   13   Name    Sample name
14    2   Spacer  Word, $0005
16    2   Size    Size of sample after header
18   10   Blank
28    4   Vol     Sample volume
32    4   Pitch
36   40   Blank
76    4   End     Header end 'SCR' + $00
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