4Easysoft Mac MP4 to MP3 Converter is a video to audio converter. It is a great tool to have if you download music videos from YouTube or other video-sharing websites and you want to play that music on an MP3 player or smartphone without the video. Although you see "MP4 to MP3" in the application's name, MP3 is not the only audio format supported. In fact, you will be able to convert your MP4 files into MP3, AC3, AIFF, AMR, AU, FLAC, M4A, MP2, OGG, MKA, WAV and WMA. So, basically, you won't have a problem finding a format that is supported by your target device.
Graphically, the app looks like all the other 4Easysoft Mac converters. There is a trimmer that you can use to shorten your videos, which comes in handy when you want to only get the music out of your files. There is also a video player that you can use to preview your file before you convert it.
You can process as many files as you want in your queue. They will start converting one after the other automatically.
In short, this is a nice app and it works well. I am not sure I would pay $21.95 for it, when there are other converters that can do this for cheaper, and even for free.