Step 1: Free download M4P to M4A Converter, install and run it, see the screenshot:
Step 2: Clicking “Add” or directly drag-drop protected M4P files. Batch M4P to M4A conversion supported.
Step 3: In the "Setting" button, choose M4A format (*.m4a), also you can custom the music.
Step 4: Click the “Start” button to start converting M4P to M4A.
After successful converting M4P to M4A, the result shall be stored on the "Output path" folder.
OK, now you can easily convert M4P to M4A with the help of M4P to M4A Converter. If you need it, just free download and enjoy it!