We have many different sounds to choose from. Select one or several and create your own reference library. Every cassette sound we offer has been thoroughly field tested before it goes on the market. Many of our sounds are broken up so the sounds go away and come back; and the intensity goes up and down to break up the constant repetition we feel predators are getting wise to. Every cassette is recorded and edited on the best possible equipment. Each tape is registered with the Library of Congress, Washington, DC, and is 100% guaranteed by Dennis Kirk Game Calls.