This device is excellent as long as you don't expect the impossible. No, it does not remove ALL of the vocals from every recording (which is impossible no matter how much you spend on a device), but it removes more than 95% of them on LOTS of them. On some recording, it only makes the vocals more faint than the instrumentals but all you need to do is to raise the volume of your mic and you could sing over the fainter vocals. On lots and lots of recordings the vocals are removed to the point where they are almost non-existent. This device is much better than a karaoke machine because you have the original instrumental backing and not some bland digitized imitation of the original arrangements. You cannot beat it for the price.

It needs a stereo in/out signal to work as do all eliminators (Tascam vocal/guitar trainer). It minimizes the common centered pan and that is usually the vocal. It works to about a 98 percentile on about 98 percent of pro mixed recordings. Some recordings are mixed in such a way that this or any vocal eliminator will not work. But they are few. If you sing over the signal for karaoke purposes it will do great. On some recordings the processed vocal is fainter than the guide melody on some karaoke songs. The more you turn up the input signal knob (before distortion) the better it works. It's well worth the money. These kind of processors used to cost ten times this price.

I read the reviews after ordering, and was figuring on get a piece of junk. It came to my house and I hooked it up and I feel it works rather well. I'm not sure if maybe it wasn't hooked up correctly by the people in the reviews or what , but I really feel that it does everything that they said it would do. It is a lot in the adjusting that makes it function correctly. Maybe you need to try it again. I feel that is worth the money that spent on it. Thanks!

We bought the Alesis Vocal Zapper yesterday. I was so disappointed--it did not even come CLOSE to doing what it claims! You can adjust the sound to distort various frequencies, thereby destroying the sound of the instruments along with POSSIBLY muffling the vocals. But, remove vocals from any recording--not even "kind of!"

I was very suprised how bad this thing was. Alesis is a very reputable company and i will forgive them for this one. It is terrible. Doesnt iven dull the vocals. It simply muffles the entire sound. However at full muffle power i could still here the vocals loud and clear. God bless musicians friend for their money back guarantee.