**I have a Mac, but I’m pretty sure it’s self explanatory for Windows once you read. and this is brief as hell**
Step 1. Choose the song you want to make a ringtone (duh). Right click and click get info>Options. Select the time you want it to start & end. No more than 30 seconds.
Step 2. Right click the same song again so that you see the option “Create AAC Version”
As soon as you do that, up pops your 30-second song.
Step 3. Right click the 30-second song and click “Show in Finder”
you’ll see this:
(or whatever your finder screen layout is)
Right click the song that has the extension .m4a and click “properties”. Then change .m4a to m4r
Step 4. Once you’ve changed it, go back into iTunes and delete the 30 second song. Drag the .m4r version you just made into iTunes. If you didn’t already have the “Tones” section, it should be there now.
Step 5. Finally. Plug in your phone. Drag the ringtone into the section where your iphone is all hooked up and what not…and then bam. It should be on there.
I lied. this wasnt brief at all.
EDIT: And don’t forget to go back and uncheck the start and end time for the original song once you’re done with everything :)