https://en.wikipedia.org/wiki/Omnichord
The Omnichord is an electronic musical instrument introduced in 1981 by the Suzuki Musical Instrument Corporation. It typically features a touch plate known as "SonicStrings", preset rhythms, auto-bass line functionality, and buttons for major, minor, and 7th chords.The most basic method of playing the instrument is to press the chord buttons and swipe the SonicStrings with …