Most people who have bought the songs from outside iTunes environment and have downloaded songs onto their iPod can not play songs. The reason behind this is the songs will be protected by MP4 or AAC format tracks to prevent duplication or piracy. However, people need not worry on how to covert the song into the MP3 format as there is a simple way to do so. Now you can convert aac to mp3 using https://convertfaster.com/mp3Conversion
While converting the song, the first thing to do is to access the iTunes program. Now try to change the song. One of the most commonly found error while converting is that it says that the protected files can't be converted into another format. Now just go and select the option to convert and click edit.
Before importing songs, just look out for preference. In this menu, the using of import can be changed to MP3 Encoder from AAC Encoder. Now save the changed settings and try to convert the song. On this conversion point, most users will still find the same error message saying that the protected file can not be converted.
This message occurred because only unprotected format such as WMA or WAV can be converted. As the songs that are in playlists are mostly will be in the formats of MP4 or AAC and they cannot be converted into any other format using iTunes. As of now, there are 2 options: The first option is to burn the song to disk, – The second option is to download a program to change tracks directly to MP3 format.