This script fixes the header of .igz and .snd audio files from Crash Team Racing Nitro-Fueled and to be possible to extract the audio with fsb_aud_extr tool.

Batch snd and igz Header Fix.py

"""
    This script fixes the header of .igz and .snd audio files from Crash Team Racing Nitro-Fueled
    and to be possible to extract the audio with fsb_aud_extr tool. Tested with the files from Switch release.

    Fix Header of .igz and .snd files from a "files" folder located on the same folder of this script
    WARNING: This script overwrites the original files located on files folder.

    Folder Structure
    -headerFix.py       :This Script (Can be other name too)
    -files\             :Input and Output Folder
"""

from os import listdir
from os.path import isfile, join, dirname, splitext

currentScriptPath = join(dirname(__file__), "files")

fileList = [ 
    f for f in listdir(currentScriptPath) if isfile(join(currentScriptPath, f))
]

for file in fileList:
    _, ext = splitext(file)
    if ext == ".snd" or ext == ".igz":
        print("Fixing header of", file, "...")
        filenameWithFolderPath = join("files", file)

        with open(filenameWithFolderPath, mode="rb") as originalBinaryFile:
            originalBinaryFile.seek(0, 2)
            numOfBytes = originalBinaryFile.tell()

            for i in range(numOfBytes):
                originalBinaryFile.seek(i)
                sample = originalBinaryFile.read(4)
                if sample == b"\x46\x53\x42\x35":
                    # print("Header found at", str(i))
                    originalBinaryFile.seek(i)
                    data = originalBinaryFile.read(numOfBytes - i)

                    with open(filenameWithFolderPath, mode="wb") as outputBinaryFile:
                        outputBinaryFile.write(data)
            
                    break

print("\nDone.")