I would like to recommend
NoteBurner M4P to MP3 Converter which can convert DRM protected M4P to MP3 on both Windows and Mac systems. The converting speed is super fast!
Convert iTunes DRM music on Windows:Step 1: Run NoteBurner, and click Settings button, then you can set the output as MP3, WAV or WMA
Step 2: Run iTunes 8. Create a new playlist in iTunes and add all m4p files you want to convert to this new list. Click on the Burn Disc button and choose NoteBurner Virtual CD-RW as your default burner to burn the playlist.
Step 3: After NoteBurner finish encoding, the converted file will be automatically listed on the main window of NoteBurner.
Click Play button or double-click any song to play the music.
Click the Folder button to open the output folder, where you will find the converted MP3 files.
Convert iTunes DRM music on Mac:Step 1: Run NoteBurner, and choose output format and output folder.
Go to the top-left NoteBurner > Preferences…
Here you can specify output path where the converted audio files will be located in, choose the desired output format from MP3 and AAC, and set the output quality.
If you want to be alerted when there is an update, check the option of “Check Updates on Startup”.
Step 2: Run iTunes, and click menu File > New Playlist in iTunes to create a new playlist to hold all music and audiobooks you want to burn.
Right-click on the music in music library and audiobooks in Audiobooks library to choose Add to Playlist and choose the list created. Press Shift or Command key to add more than one file to the playlist at one time.
After adding files to playlist, click Burn Disc button to set NoteBurner as the default burner, and then click Burn button to start burning the playlist.
Step 3: After NoteBurner finishs encoding, you can right click on the music and select “Show In Finder” to check the converted audio files in the output folder.
