Tango music sustained in the rhythm of dos por cuatro - 2/4 is distinguished by characteristic slowdowns (rubato) and polyrhythmicity. A repetitive rhythmic pattern is used in music to create a stable and predictable rhythm: a repetitive sequence of beats or accents that maintains the basic rhythm of a dance and creates its characteristic pulse. Electronic tango, where percussion instruments are actively used. the rhythm of tango creates an atmosphere of passion, drama and melancholy inherent in tango. Tango music includes complex melodies and harmonies that convey deep emotions. One of the key instruments in tango is the bandoneon, a German accordion-like instrument that gives tango music a unique sound.