RER M4A Converter – free trial
RER M4A Converter is one of the best converters I ever used.
RER M4A Converter can convert to M4A file from many video and audio file formats, including MJPEG, AVI, MPG, 3GP, MKV and so on. And it can also convert M4A to other audio formats, such as MP3, WMA, AAC and so on. It can convert several files at the same time.
Before converting, you can preset many parameters for your output files.
RER M4A Converter is easy to use. And no viruses, so safe to install.