Bigasoft M4A Converter 

Bigasoft M4A Converter is more than its name suggests. Besides allowing you to convert M4A files to multiple audio formats, this program also enables you to extract soundtracks from your favorite movies, trim songs with just a few clicks, and merge tunes into a single output file.

You can also use this utility to create ringtones for your mobile phone. The app features a built-in trimming tool, so you can easily extract the segments you need as ringtones for your mobile phone.

Another advantage is that you can import multiple files and choose individual output profiles. The application will convert the input file simultaneously.

In my testing, the program worked flawlessly. Bigasoft M4A Converter took minimum time to convert videos and songs and preserved the quality of the input files. Plus, it didn't slow down the performance of my Mac while converting the loaded media files.

In conclusion, you should definitely give this application a try if you're looking for an efficient audio conversion utility. The program is very simple to handle, works with many video and audio formats, and provides you with quality output files. In addition, it comes with an affordable price.