RIFFStrip is a simple utility for removing the RIFF-WAVE header from, for ex., a .MP3 file contained in a WAV file. It process all the chunks chain on the WAV file, and should work correctly with any type of audio stream: MP3, AC3, etc.
If the WAV file is a normal WAV-PCM, what you get is a RAW-PCM. Usage is very simple. Just supply the file name of a WAV file, to obtain a corresponding file with the added extension ".stripped". It requires no installation and can be executed from a Command Prompt window.

Usage: RIFFStrip <FileName>

The license of this software is Freeware, you can free download and free use this audio utility software.