The lock glitch is how those people get high scores so high that there is no way they could have got them otherwise, example, the #1 highscore for rockafellar skank by fatboy slim is almost 1mil more than what is physically possible. When a song starts, what you have to do is press the sleep button (top left) on your iPod. Wait til the audio fades away, then press the button again, put your password in (if you have one) and you're done. What should happen is that the song should play while the game is paused. Resume game so that it will be resumed just before it ends and you will have lots of points.
Play song while locked
Start the song, lock it and then get back in (type in ur pin etc.) while the countdown is going press lock again. The music will play while locked.
There is two ways to do this.
1. Tap All Three Buttons at the same time this way you cant miss. But you have to be quick or else you can end up with 99% or less.
2.Get 3 (Or Two) People. Each Person is in charge of one row. So Its like playing Tap Tap Revenge Or Guitar Hero With Only One Row Of Buttons. If Only Two People,Someone has to be in charge of one button.
Pause and shake
When you are playing a song on tap tap 3 when you see a symbol to shake up or side to side you pause it right when you are going to shake it. Now you are going to shake it as the note is telling You. This way You'll get more coins and more points.