A question from the clueless

[1sttimelongtime]

I have another question for you all. I am reading my way thru the back posts on this board and I came across this in the soundstage thread.


(Stevie SEEMS more together mentally than Ozzy & his guide vocal tracks in concert)


Can someone tell me what a guide vocal track is?

What is Ozzy (or anyone else who uses them) doing with them in concert? How does it work? I love Ozzy dearly, but when I went to see him a few years ago at Ozzfest I was saddened by how he sounded. I think he sounded better on some youtube footage of more recent shows, so perhaps he was just under the weather. Or maybe it is the guide tracks??? Whatever they are!!!