Fran....you're right.......I didn't think of those things. I got some great Karaoke songs off of Youtube, but I can't modify any of them. They have to "fit right into the slot" the way they are or they're useless.

I didn't know you were dealing with Karaoke files. You seem to know a lot of female singers. Have you ever thought about recording a female part to a duet like maybe the songs in West Side Story, making her voice into an mp3, and then triggering each female "vocal phrase" in between the male part? To sound like a duo. Did I say all that right?