Fretboard tapping instruments

stringed instrument of the guitar family

American-made touch guitar

thumb|280px|Playing a harpejji The harpejji ( ) is an electric stringed musical instrument developed in 2007 by American audio engineer Tim Meeks. It has been described by its manufacturer as a cross between a piano and a guitar, and by Jacob Collier as a cross between an accordion and a pedal steel guitar. The playing surface has a layout arranged in ascending whole tones across strings, and ascending semi-tones as the strings travel away from the player, with the 24-string models featuring a five-octave range from A0 to A5. Harpejjis use an electronic muting system to dampen unfretted string