Electric harp
The electric harp is an instrument based on its acoustic original. There are both solid-body and hollow body electro-acoustic models available. True electric harps have a solid body versus a hollow body electro-acoustic harp, which can be played either acoustically or electronically. A true electric solid-body harp cannot be played acoustically since it has no hollow soundbox, and must be amplified when played. Early models. Alan Stivell writes in his book "Telenn, la harpe bretonne" of his first dreams of electric harps going back to the late 1950s. He designed and had made  a solid body (after different electric-acoustic harps) electric harp at the turn of the 1970s–80s, about the same time as Rudiger Oppermann. Alan Stivell later (early 80s) had a meeting with Joel Garnier who decided to create a model. Alan Stivell went on independently to design and have different single models been made with Leo Goas-Straajer (before the Camac–Alan Stivell last experiment). The first such commercially manufactured instrument was made by Camac, also helped later by the request of jazz-pop harpist Deborah Henson-Conant. The result looked like a light framed Celtic-style harp, but each  string had a crystal (Piezo) pickup at its base. They can be plugged into various amplification systems, and players are able to use effects pedals similarly to electric guitar players. Another part of Henson-Conant's request was that she should be able to move around the stage with the harp, and thus the smaller electric harps usually include a system to strap the harp to one's body. Function. Solid-body electric harps are usually lever harps, though solid body pedal harps have also been built. Since the cost of a pedal harp is so high, it is more  economical for a harpist to purchase an electro-acoustic model of pedal harp, as it can also be played without amplification. An electro-acoustic harp looks nearly identical to a regular acoustic harp, whether lever or pedal. It has piezo pickups at the base of each string, and some also contain a separate microphone inside the soundbox, enabling the harpist to mix the signals from both kinds of pickups to produce special effects. Often such harps include an onboard preamplifier. One of the most famous electro-acoustic pedal harp models is Camac's "Big Blue", finished in a striking electric  blue colour. In the late 20th century instrument builder and American musician Robert Grawi created an electric double harp-lute based on the West African kora but strung and tuned differently. The gravikord is a light ergonomically designed instrument made of modern materials mostly stainless steel tubing. It was created to enable easier playing of complex African cross rhythms on an African derived modern electro-acoustic harp. It is a double harp that has 24 strings evenly divided in two ranks arrayed on a free standing "Vee" shaped bridge made of synthetic material including an integral piezo-electric sensor. Electric