From MedaFan Technology:
Batch Audio Converter is a free convert tool, use this tool can convert your video/audio files into .wav format. This tool can add one or more files to convert list one time, you also can add a folder, Batch Audio Converter will scan and add files from the entire folder. This tool will try to use the decoder which are installed in your system when decode a media file, you can check our website to download the decoder. Batch Audio can store the output .wav files to the place which is you have selected, same folder as source file or specified folder, you can choose it in options window.