The attack tone shoots through the string in a longitudinal wave and generates the typical science-fiction laser-gun sound as heard in Star Wars.It is tuned in just intonation[3] and played by walking along the length of its approximately 100 90-foot (27 m)-long strings and rubbing them with rosined hands and producing longitudinal vibrations.[4] In 1981 Terry Fox also recorded two musical pieces called Berlin Attic Wire, Beating with a long string instrument.The experimental luthier and recording artist Yuri Landman built a portable electric long-string instrument.[9] Sound lab and research centre Sonoscopia in Porto, Portugal has a permanent electric amplified long-string instrument mounted to the wall in the hall of their building.