To use any of these options you’ll need an acoustic guitar equipped with a pickup of some kind from which to output a signal. The most frequently used type is a piezo-type pickup, located under the guitar’s bridge to capture the string vibrations. These are often paired with an active preamp on the guitar itself to control overall level and EQ, though there are passive piezo examples that offer a pickup only. Other pickup options include magnetic pickups that are positioned in the acoustic guitar’s soundhole and work like an electric guitar pickup, internally placed transducer body sensor pickups that detect guitar top vibrations, and internal mics that are often blended with a piezo pickup signal.