Capo plays a B note for any capo position at or below the seventh fret), and thus a performer does not need to adjust for or relearn the entire fretboard as they might with retuning. The scale length of the strings of an instrument affects the timbre of the strings, and thus the use of a capo may alter the tone of the instrument. Musicians also use capos to bring a guitar tuned below standard up to standard tuning. Manufacturers sometimes recommend tuning a twelve-string guitar a whole-step or more below standard to offset the additional stress of the additional strings.
Rhythm game accessories existing "Rock Band 2" drum sets. For the pro guitar mode of "Rock Band 3", a pro guitar controller is required. Unlike standard guitar controllers, pro guitars allow input of any fret/string combination, allowing accurate simulation of a real guitar. The Fender Mustang Pro Guitar controller, which is based on the Fender Mustang, has 102 buttons along its neck which simulate holding the guitar strings against the fretboard. All six strings are represented along 17 different frets. In order to simulate picking/strumming, the Mustang pro controller features a "string box" located on the body of the controller (around the position