Question Can I adjust the boost level on my VoiceLive Play GTX Answer Absolutely. To adjust the boost level you need to plug in the Switch-3 foot controller and assign one of the buttons to Boost in the Switch-3 screen under setup. Then, you press the button when on the guitar effects screen. Youll see Level and Drive get a (B) next to it. Thats your boost level. Once its set, you save the preset and itll go back and forth between the regular and boost setting when you press the Switch-3 button.