As its name shows,dream MP4 to MP3 converter can convert various video formats like MP4, MPEG-1, WMV, AVI, 3G2, MOV, RM, RMVB to MP3.It can also convert various audios including WAV, WMA,etc to MP3.You can rip your audio CD into MP4 files by MP4 MP3 Converter. Why not MP3. Because MP4 files are generally higher quality and slightly smaller than MP3 files of the same song; and more and more portable devices support MP4 file now.The software can add ID3 tag (includes title, artist, album, year, comment and genre) when converting files to MP3/MP4/M4A/M4B. The software also supports to keep ID3 tag (includes ID3v1 and ID3v2) of original file when converting. You can get rid of a channel of a stereo file by the program.MP4 MP3 Converter supports batch conversion. You can add multiple MP4 files or a folder, or drag and drop several MP4 files and folders onto main window of the converter; it will search all MP4 files and add them to conversion list, and convert in batch.If you have bulk of MP4 files within different folders, and you want to convert them to MP3/WAV format and output to another folder or driver and keep the original directory tree, you can use the feature we designed for you.