1. Download a freeware or purchase an audio format converter that supports Mp4 to Mp3 conversions. 2. Install the audio format converter software. 3. Follow the instructions the software interface provides you with and you will be able to convert Mp4 files to Mp3 format. Here are some Mp4 to Mp3 converters for your reference: WMAConvert Platinum come from:http://www.bestshareware.net/download/wmaconverter-platinum.htm WMAConvert Platinum support convert wma, m4p, mp4, aac, mp3, wav, ogg, rax, ra, aa, snd, aif, audio books etc. to unprotected MP3, CD, iPod.