Instruct: Classify Amazon reviews into positive or negative sentiment
Query: awful amateur singers

I am a singing teacher, I bought this because I did not have enough time to create midi files myself. I still can't use this in my class, because what students hear is what students learn.This product consists of 2 discs.One is with (other people say and I can guess) awful guide vocals, another with awful background vocals. I know it does not worthy of cheking the first disc with the guide.The "singers" are no professionals, not even in the future, but just BIG VOICES. They never understand music at all, all amateurs forever.I wonder why they don't leave the backing tracks alone, without those wanna-be vocalists.....I know "2 disc set" is the easiest way to lift the price.Then let me suggest, one with awful background vocals, another without any vocals at all. That will be the best.Their "guide" vocals will not guide you anywhere, anyway.