I built winamp karaoke plugins. These plugins include
a mp3 decoder plugin, an avs element (an APE file) which can display lyrics. You can use this element the same as other rendering element.
The karaoke lyrics is encoded into ID3 tag in the mp3 file. This kind of mp3 file is called mp3k file. my decoder can decode the lyrics display and highlight information from the mp3k file.. Common mp3 decoder can not decode the lyrics information from mp3k file, but can decode the audio information.
I will provide the plugins, demo songs (jungle bell and danny boy) and also the source code of the plugins. Please send me a email if you are interested in this. I really don't know where to put it. ^_^