Answer: polyphonic

AnswerCrossword Clue
polyphonichaving a multiplicity of sounds also POLYPHONOUS
polyphonic(esp. of vocal music) In two or more parts, each having a melody of its own; contrapuntal
polyphonicProducing many sounds simultaneously; many-voiced
polyphonicconsisting of many voices or sounds.
polyphonic(of an instrument) Capable of producing more than one note at a time