RAW audio files

I extracted audio files from Heroes IV video game. But they all RAW and every file has own format: some 8-bit, some 16-bit unsigned, some 16-bit signed big-endian. Are there a way to guess audio format from content? Preferably non-calculus based.

>>25
I'd say the general modding scene is like that. There is prestige in reversing hidden knowledge and many modders use their skills as a way to signal their superior intelligence rather than using those skills to uncover knowledge for society's sake.