Can I use music on iphone ringtones?

Can my iPhone ringtone be something from my music files, or does it has to be the iPhone ringtones? And if I can choose a song from my music, can you tell me how?

Nope. Has to be and iphone ringtone the only why to use a song is if your iphone is Jailbroken

The folks at Apple want you to buy a ringtone from the iTunes store, but here's how to go about creating one manually for free; the process is a little complicated, but simple enough once you get it figured out the first time:

1. First, make sure you have the most recent version of iTunes installed by pressing alt with with the iTunes main screen up and selecting Help>About iTunes.

2. Once you have the most recent version, choose a song you want to make into a ringtone, keeping in mind that it has a limit of being a max 30 seconds long during whichever part of the song you'd like (You can even add non-iTunes songs by ripping from a CD or adding music files through File>Add to Music Library within iTunes).

3. Listen to the song and count out up to 30 seconds from the point where you want the ringtone to begin and mark down or remember the time that you want the clip to end. Now right click the song and select "Get Info", now select the options tab at the top. Copy the time listed under "Stop Time" to clipboard, you'll need to put it back when you're done; next change the "Start Time" to whatever time during the song that your ringtone is going to begin at and the "Stop Time" field to however long within 30 seconds you want your new ringtone to end and check the boxes before both "Start Time" and "Stop Time" then click "OK".

4. Here's where it gets a bit complicated, right click the song again and select "Create ACC Version", then open the "Get Info" page again for the original song (you can tell them apart by the song durations, the soon-to-be ringtone will be 30 seconds or less) and past that original time from your clipboard back into the "End Time" field.

5. Next you need to make the new file into a ringtone. Right click the new shorter ACC song you made and select "Show in Windows Explorer". If at this point you don't see any file type at the end of the file names, you need to tinker with settings a little, press alt and select at the top of the window View>Options>Change folder and search options, under the "View" tab, uncheck the box marked "Hide file extensions for known file types" (If you aren't too computer savvy, I -very- strongly suggest changing this option back once you're finished with this whole process, you can screw up a lot of your files by accident later on when renaming if you aren't sure what you're doing). Okay, now rename the file without track number as whatever you want it to be in your phone's ringtone section later and change it from.m4a to.m4r (be sure it's the new ACC and not your original song, should be named something like "xx songname 1"). I suggest right clicking and deleting the 30-second ACC clip in your main iTunes library (in -iTunes-! Not the Windows file folder!) to clean things up a bit at this point, as you already have the ringtone in your "Tones" section and no longer need it.

6. Almost done. By default, iTunes doesn't display the tones section, to turn it on, open iTunes and press alt then select at the top, Edit>Preferences and check the box for "Tones" under "Sources".

Congratulations, you just made your first free iTunes ringtone. Sync your phone and you can change your ringtone to the song clip tone you just made at the top of your ringtone list in your phone by going to Settings>Sounds>Ringtone.

As of writing this, the iTunes version was 11.1.3.8 on a Windows 8 PC.

Its not as easy to do so as it should be but yes it is entirely possible for it to be music from your collection.

The easy way would be through http://ventones.com. Pretty easy, just select song, trim which 30 seconds you want, have it made & then download & sync through iTunes. Done.