convert mp4 to mp3 is easy-to-use and professional mp4 mp3 converter software. it can convert mp4, avi, mpeg, wmv, mov, rm to mp3 and extract sound from mp4 to mp3, convert mp3 to mp4 m4a as well. more features are below: * easy-to-use user-friendly interface * support preview. you can watch video and listen music at the same time when conversion. * it supports batch conversion. you can select all files you want to convert and the software will automatically convert them one by one. * default and selected settings. when you convert your files, bitrate, vbr or cbr, stereo or mono etc can be selected or you can just keep the default settings to get the best output quality etc.. * convert any clip or segment. to download and get the software at http://www.soft29.com.