Released in 1981, the Omnichord is an electronic musical instrument with an automatic accompaniment function (auto bass/chord) and equipped with a harp sensor. By pressing a chord button and sliding your finger on the harp sensor (strumplate), an arpeggio corresponding to the chord is heard, allowing anyone to easily accompany a song. Omnichord does not require any previous musical experience with an instrument, or even knowledge of staff notation. All that is needed are the chord names required to play a song which is a method commonly known as ‘tab’.