Omnichords feature preset rhythm patterns with
tempo and
volume control, as well as an auto-bass line feature, which the player can combine to use as a musical accompaniment. The Omnichord's most unique feature is the Sonic Strings strum plate, that allows the player to 'strum' arpeggios like a guitar. Several later models of the Omnichord added
MIDI compatibility, a greater selection of sounds for the Sonic Strings,
vibrato, and chord memory, called Chord Computer. The Omnichord was primarily designed as an accompaniment instrument instead of a melody instrument, with little
music theory knowledge. The Omnichord has three main sound generators: • A percussion section that plays
rock,
waltz,
slow rock,
Latin, foxtrot and
swing rhythms, with adjustable tempo and volume. • A chord generator providing different
triad and
seventh chords, either as organ-like chords or walking bass. The original OM-27 was only capable of playing 27 different chords, but later models allow 84 different chords. • A Sonic Strings section producing an arpeggio or isolated notes from a chosen chord over a 4-octave span, played using the touch strip. The notes played on the touch strip are always in tune with the chord button currently selected. Later models featured a selection of different voices for the Sonic Strings, including vibes, brass, organ, guitar and banjo. == Users ==