It does nothing in the Beatles game. It toggles between different types of sound effects for guitar solos in Rock Bands 1 and 2, but they left those sound effects out in Beatles Rock Band because it would have been messing with the music
I`ve seen this switch in the beatles guitars and bass, do they have any special fuction in the beatles game?
(Sorry if my english is very bad... )
How do you activate effects in Rock Band 2 on a Guitar Hero 3 Wii guitar?
If you have to ask, then yes.