An assult on the ears

Gauchos - natives of Rio Grande do Sul - have an linguistic tic which is proving irritating. When they´re listening to someone they keep saying ´´´Ta, ´ta, ´ta, ´ta.´´ All it means is ´´´K, ´k, ´k, ´k.´´

Call me unreasonable, but it´s winding me up something chronic.