Convert Your Audio to AAC (And Shorten It if Necessary) There's a good chance your audio file is in MP3 format. You'll need to convert it to AAC format to use it as a ringtone.

How to Convert MIDI Ringtones for iPhones. The native file format for iPhone ringtones is M4R. In order to use MIDI ringtones on your iPhone, you must first convert them to M4R. You can use iTunes ...

Additional Tips and Considerations Ringtone length limitation s: Custom ringtones are limited to 40 seconds in length. You may need to trim longer audio files before converting them to M4R format.

An iPhone is barely "yours" until you personalize it, and one of the easiest ways to do this is choose, buy, or import your own ringtones.

If you want to use an audio file as a ringtone in iOS, you can use Terminal and iTunes to convert and import tones to your device.