Using iTunes
1.
Open iTunes, and then open the iTunes settings.
2.
Select ‘General’
3.
Click the ‘Import settings’ button.
4.
Select ‘MP3 Encoder’ from the ‘Import’ menu.
5.
Click ‘OK’.
6.
Drag MP4 you would like to become an MP3 to iTunes.
7.
Select MP4 and click on ‘Advanced’.
8.
Select ‘Create MP3 version’ and the MP4 device becomes an MP3.
Use switch
1.
Open Switch and click on ‘Add Files’. ‘
2.
Select the MP4 you want to convert to an MP3.
3.
Click on ‘Select
Select ‘MP3’ from the ‘Output Format’ menu.
5.
Click ‘Browse’ and select the folder where you want the converted file to be saved.
6.
Click ‘Convert’ and MP4 will be converted to an MP3.
Using dBpoweramp
1.
Open dBpoweramp and click k. Scroll.
2.
Select the MP4 you want to convert to an MP3.
3.
Click ‘Open’ to import this MP4.
4.
Select ‘MP3’ from the ‘Convert To’ menu.
5.
Click> ‘Folder’ next to Output location and select the folder where you want the converted file to be saved.
6.
Click ‘Convert’ and MP4 will be converted to an MP3.
There are many audio formats and many programs that can convert files from one format to another. Converting an MP4 to an MP3 is useful when you want to download the music file to an MP3 player or burn it to an MP3 CD. If you want to convert an MP4 to an MP3, you can use a free audio program such as iTunes, Switch or dBpoweramp.
Source:danspela.com