The WILD FRENZY is another revolutionary invention by Rockie Jacobsen and Kristy Titus. Our newest breakthrough contains the V.E.T.T. (Volume Enhanced Tone Technology) system as well as our tried and true Tone Selector. With its V.E.T.T. (Volume Enhanced Tone Technology) system it creates true, easy to obtain elk sounds. The Tone Selector on the end of the bugle tube gives you the ability to change the volume and control the back pressure on your diaphragm. These two specialized features help you obtain the most realistic bugles possible.image