Never heard the Roar or growl. Have heard the snort wheeze,but you can make a great wheeze sound bu placing your upper teeth against your lower lip and blowing air through it. Easy. An aggresive growl will scare off immature bucks I used itearlier this season to ward off a pair of forkies that were coming towards me and didn't want them to pass my stand.and bust me (possibly). Along aggresive growl broke up their sparring, the larger forky took a few steps in my direction and then they both trotted away the way they came. Guess they didn't want to get their butts kicked by the big boy!