Feedback lapsteel : exploring tactile transducers as string actuators

The Feedback Lap Steel is an actuated instrument that makes use of mechanical vibration of the instruments bridge to excite the strings. A custom bridge mounted directly to a tactile transducer enables the strings to be driven with any audio signal from a standard audio amplifier. The instrument can be played as a traditional lap steel guitar without any changes to playing technique as well as be used to create new sounds that blur the line between acoustic and electronic through a combination of acoustic and computer generated and controlled sounds. This introduces a new approach to string actuation using commonly available parts. This demonstration paper details the construction, uses and lessons learned in the making of the Feedback Lap Steel guitar.