How to cancel SMS ringtone repetition in IOS7

1, open itunes and open the music library in the database.

2. Then select the music to be deleted, and then select Delete from the right-click menu.

3.iphone connects to the computer and enters the device.

4. After entering the device, select the music option. Click "Sync Music". Deleted music can be deleted. Or check the music that needs to be put into the phone in the music list, and then click Sync.