Before you know how to make a customized ringtone with the iTunes song for your iPhone 7/7 Plus, 6s/6s Plus, 6/6Plus, you should know something about the ringtone format used in your iPhone. The music you purchased from iTunes store have two kinds of file extension: .m4a (copy-free file format known as M4A) and .m4p (copy-protected file format known as M4P). But the ringtone format of iPhone is restricted as M4R. So if you want to make the song you purchased from iTunes as your iPhone ringtone, you must convert M4A into M4R format.
What is M4A
As I said above, the audio files you downloaded from iTunes are sorted into two kinds, .m4a (copy-free) and .m4p (copy-protected). MP4 and M4A files are quite similar, being both based on the MPEG-4 codec. However, M4A is a file comprising solely of audio, whereas MP4 may also contain video. The M4A file uses Apple's codec and resides within the MPEG-4 container. M4A is the file extension for MPEG-4 Audio, the audio part of your MPEG-4 videos. Apple has used the .m4a designation for several of the low-loss audio formats. Media Players that can deal with M4A are able to deal with M4P.
What is M4R
M4R is essentially a renamed AAC file, and it is an iPhone ringtone file. You can convert any DRM-free song or audio clip in your iTunes library into a ringtone by converting the audio fromat from M4A to M4R. M4R files are transferred to one's iPhone automatically when the iPhone is synced with his/her computer.
Top M4A to M4R Converter
Apple Music Converter is absolutely among the top three audio converters worldwide. It is fully compatible with both 32bit and 64bit Windows systems (Windows 7, Windows 8, Windows 10 and Mac OS 10.9.5-10.12). Additionally, it can remove the DRM protection from M4P/AA/AAX and convert them to DRM-free M4R, MP3, FLAC, etc. It's also possible to extract audios from iTunes movies, TV shows and Podcasts without quality loss.
Apple Music Converter – An Excellent Audio Converter
It enables you to convert iTunes music to MP3, FLAC, AAC, etc. Download the free trial version below.DownloadDownload
How to Convert M4A to M4R
Make sure you have iTunes installed in your computer then you can go to Apple Music Converter to download the software and install it. After the installation is over, Apple Music Converter will launch along with iTunes automatically.
You can choose the M4A files from the "Playlists" section. You can undergo several conversion tasks at the same time if you have more than one song to convert.
After you are done selecting M4A files, click the "Output Format" and choose M4R from the drop-down list as the output format. You can also change the output parameters in details by adjusting the "Codec", "Bitrate", "Sample Rate" and "Channels" to meet your own requirement if necessary, but normally the default settings are already the best.
After you make sure all settings are completed, then you can click the "Convert" button. Apple Music Converter then will start converting and in few minutes the procedure will finish. You can then sync the converted music to your iPhone device via iTunes so that you can make it as your own ringtone.
It is really a convenient way to convert audio files with Apple Music Converter, isn't it? However, this is just one small piece of its full functions. It also enables you to remove DRM from the songs you download from iTunes without causing any quality loss. With the DRM gone, better yet, if you convert them into compatible format you can transfer the songs into any devices and play.