[George]

There are vocal harmonizers out there that are supposed to do just that, but I have never felt like risking the money to see how effective they are.

I use an audio editing program called Goldwave. Goldwave will allow you to mix any .WAV audio files you wish, and accomplish what you want. You could sing solo and mix in other files of yourself wherever you want to, if not for the full song.

If you didn't want to sing the song over several times in different keys, I'd imagine you could make several tracks changing the track each time with Keyrite, save them, and mix them......A bit of work, but worth it.

I just finished adding real recordings of rain and thunderstorms as background to some tracks of me singing. Sounds kinda neat. Got the idea years ago when Mystic Moods orchestra did the same thing to a couple of instrumental albums.

Hope this helps.

George