Yamaha LSTA TransAcoustic GuitarExperience authentic sounds with our TransAcoustic acoustic guitar. Simple controls, comfortable playability, and quality design for an unparalleled musical experience. Actuator An actuator installed on the inner surface of the guitar back vibrates in response to the vibrations of the strings. The vibrations of the actuator are then conveyed to the body of the guitar, and to the air in and around the guitar body, generating authentic reverb and chorus