This is just another example of the junk out there that is so Hyped Up in advertising lingo that it should be against the law to even print it. I have been a Karaoke KJ for over four years and thought from the advertising hoopla given this piece of equipment, it just might make a bit of a difference to some of my " on the edge" singers. Well to tell you the truth it makes them sound worse, kind of like they are singing in a barrell. Don't waste your money on VocoPro's "Vocal Enhancer", it is just not worth the money.