'Rock Band 3' starts by asking you to calibrate your instruments before you start to jam. Metaphorically this is like tuning your instrument in real life, fixing the lag between your instrument and the audio/video signal, taking the blame away from the game. For example my audio audio and video was off by 23-28 milliseconds, which might not seem like allot. However, when you're asked to be precise to the second, it counts. Unless you are some kind of punk-rock gamer, you will be missing four easy gamer points and more importantly notes.