Here's some more info I got from asking around (if it helps someone have an idea as to how to help):
someone on another forum said:
"After the "CSX1" header, you've got what seems like a file type. Some observations: If it's type 6, then it seems to be a single multi-channel stream (music/cutscene) - the value at offset 0x8 seems to be the number of channels (2 or 4). If it's not type 6, then it's a bunch of mono audio files (count at offset 0x8, table at 0x18 with 0x20 bytes per entry). The table contains sample rate, start offset, size and some other unknowns.
I've done some manual tests and a lot of them are standard XBOX ADPCM, particularly the mono files. However, some of the multi-channels ones seem to be different - some are XBOX ADPCM and some look like another codec.
For multi-channel files the audio data seems to start at 0x11b8. For mono files, they start at the next 0x200-byte block after the file table."
Also, the xmen_1.ctf file in the prototype sounds folder appears to be a list of all the files that are in x_common and all the files that are in that are in x_voice in the prototype.
And here is some info about the final retail build's sound files for each console version from another Marvel Mods member:
"The sounds are all console-specific within the zsm file. Xbox uses XBADPCM, PS2 uses .vag I think, and the GameCube uses .dsp files.
There isn't a PC version of X-Men Legends 1, but the PC version of X-Men Legends 2 uses .wav files
So it does make sense for them to conclude about XBADPCM"
Here are the sounds from the retail Xbox version for comparison:https://drive.google.com/file/d/11iq0Et ... sp=sharing
And here's the zsm sound editor we use for the retail sounds:https://www.mediafire.com/file/tbqzfjob ... r.zip/file