An electric piano is an electric musical instrument whose popularity starte in the late 1960s, was at its greatest during the 1970s and still is big today. Many models were designed for home or school use or to replace a (heavy) and un-amplified piano on stage, while others were originally conceived for use in school or college piano labs for the simultaneous tuition of several students using headphones. Unlike a synthesizer, the electric piano is not an electronic instrument, but electro-mechanical. Electric pianos produce sounds mechanically and the sounds are turned into electronic signals by pickups.