Select start and end time from video cut option to trim out the parts that you don't want.
And from there, go ahead and choose mp3 music that you would want to convert into m4r format and make it your ringtone.
Rename the file In the iTunes library, choose Show in Finder if you are using Mac or Show in Windows Explorer in case of Windows system to locate your converted file with m4a file extension.
Assess your created ringtone To check your ringtones, select ringtones in the left pane of iTunes to see if it has been imported.
However, they don't always include all of the features you'd expect to aid you.
Itunes allows its users to explore their features by enabling them to create a ringtone in iTunes.