Polyphonous in a sentence as an adjective

A group of humans in synchronous motion and polyphonous vocalization might appear quite formidable to a large predator, and the behavior could have begun to emerge immediately upon or simultaneous to human ancestors' descent onto the open savannah.

Polyphonous definitions

adjective

of or relating to or characterized by polyphony; "polyphonic traditions of the baroque"

See also: polyphonic