River Past Audio Converter 7.7
This program can be used to batch convert many types of files into an audio format. River Past Audio Converter directly supports encoding AVI and WAV files. The other encoding formats are available either through Windows libraries, or through additional downloads. Downloading the files needed to enable saving in MKA, MP3, OGG, M4A, MOV, RA, or WMA format is very easy, because links are provided in the “Download” menu. 
The supported input formats depend on the codecs that you have on your system. If you can open an audio or video file using another software installed on your computer, it’s almost sure that you’ll be able to convert it using River Past Audio Converter.
When you start the program, you should add a list of files to the coversion list. Next, you should set an output format and customize the output quality. The final step of the process, is selecting the output directory and starting the conversion. The list of files, which are to be converted, can be saved to your computer using a special XML file.