The Boss AC-3 also gives the electric guitarist the sound of an acoustic guitar. This pedal ensures that you never have to drag with two guitars. The COSM modeling technology allows each electric guitar to be converted into different acoustic guitar models. The Models Standard, Jumbo, Enhanced and Piezo are styles of which the pedal possesses.The virtual soundbox resonance can be adjusted with the Top and Boddy buttons. Also has the AC-3 reverb of which you can determine the quantity yourself.