M4A MP3 Converter converts M4A/M4B to MP3 and MP3 to M4A/M4B quickly. The software is an easy to use and ALL IN ONE audio converter that supports more than 110 audio and video files, and keeps ID3 tag when converting. It is full compatible with Vista and Windows 7. M4A MP3 Converter is also a M4B audiobook converter that could convert any file formats to M4B audiobook. The M4B audiobook is compatible with iPod, iPad, and iPhone. The software could convert multiple files and join to one M4B audiobook.You can convert files to MP3, M4A, M4B audiobook, FLAC, AIFF, OGG, AAC, and WMA with the converter. If you need to extract audio from video file such as AVI, WMV, MPEG1, MPEG2, MPEG4, DVD, and QuickTime MOV, it is also possible with the software. The converter supports batch conversion. You could add bulk of files and then convert them at a time. M4A MP3 Converter enables user to change encoding parameters of target files such as codec, sample rate, bit rate, and channels. So you can customize target file as you prefer to. The software could normalize volume of M4A, M4B, MP3, and other files automatically so that the output files have the same volume.