M4Ps are the protected audio files Apple once sold in the iTunes Store. The digital media store has since gone DRM-free for all music files. For a fee, it will remove the copy protection from previously purchased songs. With the protection removed, you can play the music back on any digital media device or desktop media player. If you aren't willing to pay Apple to remove the copy protection you never wanted in the first place, there is a simple way of re-importing the tunes in the more universal MP3 format.
Open iTunes. Create a new playlist by selecting "File > New Playlist."
Drag the M4P files from your iTunes library to the new playlist.
Insert a blank CD. Highlight the playlist within iTunes and select "Burn Disc." Select "Burn Disc" again to confirm.
Eject and re-insert the CD once iTunes completes the burning process. The CD will show up in iTune's sidebar under devices. Highlight it.
Select "Import" to import the songs into your iTunes library. The songs will import in the DRM-free MP3 audio format.
- Before importing the songs from the CD, make sure iTunes is set to import files using the MP3 encoder. This can be set via iTune's Preferences -- "File > Preferences/Options". Select "Import Settings..." via the "General" tab. Select "MP3 Encoder" via the drop-down menu and select "OK" to save.