How to use Google Music MP3s to set a ringtone/alarm? I have bought various albums through Google Music cloud service and they are downloaded for offline use on my device. How can I use one of these MP3s as a ringtone or an alarm?
It seems that the standard picker is not able to find them.
If you are comfortable with copying files in a file explorer


Go grab ES File Explorer if you don't have a file manager already.
Make sure that root browsing is enabled and navigate to /sdcard/Android/data/com.google.android.music/files/music.
Hopefully you don't have too many songs stored locally, cause this is the not-so-fun part.  Go through song-by-song by selecting one and using Google Play Music to complete the action.  When you find which file is the right song, copy it (for ES, long press then select copy, could be different for other apps).
Now navigate to /sdcard/media/audio/&lt;whichever_folder_applies_to_you&gt; if you are on pre-ICS or /sdcard/&lt;whatever_applies_to_you&gt; if on ICS or Jelly Bean.  Paste it in (Hitting Paste on the status bar for ES) and you should be good.


If you aren't comfortable with copying files in a file explorer

If for some reason you don't want to copy, then still figure out which song is the right one.  Then when you go to set your ringtone/alarm/notification use the ES File Explorer entry that pops up.  Then navigate to /sdcard/Android/data/com.google.android.music/files/music and select the right song.