OK,This is just my opinion on the subject.Somethin I've noticed over the years.I don't think the tone of a call(raspy,high,etc.) matters as much as the rythem of the guy usin it.Most people(not all) will run a mouthcall faster than a slate type call and a slate type call faster than a box call.The exception to the tone rule is on a windy day a higher pitched call will reach out a little better.