The Trick is NOT everlasting. After awhile the game will not let you slow it down anymore and will progress you through no matter what. I failed like 5 times at a song, constantly using the slow it down method and then when I tried to get the slow it down thing to show up, it absolutely refused. There is a limit to how many times you can do that...
Badass in a Sig #1 - Hiei (Yu Yu Hakusho)
Somewhat of a Vegeta Complex but all around kickass son of a ice-bitch, Hiei is the Uchiha before Uchiha became a thing. Demon, quick to the kill and an awesome voice actor (same as Android 17!!).