I successfully loaded 3 MP3 ringtones on a Lingo today, one of which was 205kb, 56kbps bitrate, 29 seconRAB long.
One thing that did not work the same as the Strobe was that I had to rename the .mp3 to .midi instead of .qcp
First off, I am assuming you already have some MP3 ringtones (15-30...