Producers also "sweeten the mix" on talent shows and concerts by dubbing in applause in the background. American Idol and X-factor is notorious for doing this. You will hear wild applause and screams from the audience, but if you watch closely the audience is not nearly as enthusiastic as they appear. Its also done on sports as well. A couple of years ago, the applause track got stuck during a football game, which was very obvious. One of the most annoying thing they do is the way morning radio has gotten noisy, with canned music or even worse drum machine tracks playing in the background whenever someone is talking, or doing the traffic or weather.