Set MP3 as ringtone on CyanogenMod 10 Without using a market app, how can I set a custom MP3 file as ringtone?
I've tried placing the MP3 in media/audio/ringtones and variations (e.g. media/ringtones), but the MP3 does not show in Settings->Sound->Ringtone. 

Thank you.
I placed mine in /sdcard/media/audio/ringtones. After that the sound appears in the settings menu.

See also: How do I set a custom MP3 as a ringtone for other notifications?