If you have an mp4 video files, you can get audio/music/songs in mp3 format from video media. Download mp4 to mp3 converter software for free from: Get mp3 from mp4 videos
The mp4 to mp3 converter software free is easy to use, and it helped me last time. You can use it to convert any mp4 files to mp3 so that you add it to iTunes, android phones, or play mp3 songs on your iPod touch, classic, nano, shuffle, windows phones, blackberry, samsung galaxy S6, S6 Edge, S5, S5 mini, S4, S4 mini, Note 4, Note 3, Alpha, A7, A3, Core, etc.
Here's some other useful video converter tutorial:
convert any video to audio format