this is episode 26 of the freeofnix series
(description of the episode from wikapiada)
Using a new invention from Nerdry, Mantyz manages to steal BB's voice and store it inside of ComaCo's main computer system. Vox has detected a weak spot in the void, centered in the computer, and wants to manipulate BB's voice to crack it open. With BB now silent and Nerdry unable to figure out how to use BB's voice, a new plan is hatched.