I think I saw a previous post about the same question when searching a karaoke issue for someone else. cd-g is the usual format. Use the search button above & type in KARAOKE to see if you can find the answer.

Within LW I guess you could do an Any Type search, type in karaoke or .cdg or .cd-g or cdg or cd-g
I just tried them with success. cdg & .cdg seemed to work very well.