Joke Collection Website - Public benefit messages - What is the format of Apple's ringtone?

What is the format of Apple's ringtone?

It's M4R's.

Let me tell you the production process.

Import the mp3 file you want to use as a ringtone into itunes.

Right-click the song and select "Show Info".

Select the option, and fill in the start time and stop time (within 40 seconds) and OK.

Right-click the song again and select "Create ACC Version", and the same file name will appear, which lasts less than 40 seconds.

Right-click the newly created song and select Show in windows Explorer.

Rename the suffix "m4a" in the file name to "m4r".