by only changing the fingering on the fret buttons without having to strum each note. Sequences where strumming is not required are indicated on-screen by notes with a white outline at the top of the marker instead of the usual black one, with Guitar Hero III: Legends of Rock adding a white-glowing effect to make these notes clearer. Guitar Hero World Tour features transparent notes that are connected by a purple outline; players may either simply tap the correct fret for these notes without strumming or utilize a touchpad on World Tours guitar controller to mimic the slide technique. In addition, notes can now be played while a sustained note is being played. World Tour also adds an open string note for bass players, represented by a line across the fret instead of any note gems, that is played by strumming without holding down any fret buttons (the sixth installment, Warriors of Rock, features an open note sustain for bass instruments as well). Guitar Hero World Tour introduced drums and vocal tracks in addition to lead and bass guitar. Drum tracks are played similar to guitar tracks; the player must strike the appropriate drum head or step down on the bass drum pedal on the controller when the note gems pass the indicated line. Certain note gems, when using a drum controller that is velocity-sensitive, are "armored", requiring the player to hit the indicated drum pad harder to score more points. Vocal tracks are played similar to games such as Karaoke Revolution where the player must match the pitch and the pacing of the lyrics to score points. Guitar Hero 5 allows players to create a band of up to four players using any combination of instruments. While the song is playing, the background visuals feature the players' chosen avatar, along with the rest of the band performing in one of several real and fictional venues. The reaction of the audience is based on the performance of the player judged by the Rock Meter. Guitar Hero II added special lighting and other stage effects that were synchronized to the music to provide a more complete concert experience. The games developed by Neversoft feature a simple storyline, usually about a band's quest for fame, which is told through animations played throughout the game. These animations were created by Chris Prynoski and his studio, Titmouse, Inc., who have also done animations for