From reading I dont understand the differemce between these 2 audio settings. Variability and Limits. /have not had a chance totry them while hunting. Just read about them and cant grasp the diff. got the part where limits is just working in Multi tone. Does the variability make a bigger diff say between dime and quarter when you set it higher. If so what does limits do?? Explanation of these 2 setting would be appreciated ....thanks in advance..Sonny