'Best AVI to MP3 Converter' converts audio from AVI videofile to MP3 audio file with given bitrate. After installing the software, you need to select AVI file you want to convert. Other fields will be completed automatically (you can change them if you want to). Click 'Convert' and software will do the rest. Also you can drag & drop AVI file at program icon or program window and after that you only need to press Convert to start conversion.