Why does the Apple 6 sync ringtone take too long? What should we do?

Apple 6 synchronizes files with ringtones for up to 40 seconds.

There will be a prompt after the general time is over.

First, select a file within 40 seconds, and then upload it again, as shown below:

1. 1. Open itunes and select File-Add File to Library in the menu bar. As shown in the figure below:

2. Select the song to ring, and click "Open", as shown in the following figure:

Third, songs will appear in the "database" of "Music". Right-click the song and select "Show Introduction", as shown below:

4. Select "Options" and fill in "Start Time" and "Stop Time" (within 40 seconds) PS: iPhone ringtone should be within 40 seconds, as shown below:

5. Right-click the song again and select "Create ACC Version", as shown below:

6. A file with the same file name but less than 40 seconds will appear, as shown below:

7. Right-click the newly created song and select "Display in windows Explorer" to change the format of "m4a" to "m4r", as shown below:

8. Add the m4r file again according to step 1. Find the ringtone in itunes and sync it to your phone. As shown in the figure below: