Freeman Tweaked Mellow Dog D Whistle - NEW 2013 Model Similar sound to the mass-produced whistles, but with a clearer tone and easier playability. In tune Elimates the uneven register issues that show up in mass-produced whistles. High notes stay sweet and pure rather than going shrill! The newer model features an attractive brass ring around the base of the mouthpiece to improve durability and prevent cracking when the whistle is tuned (updated pictures coming soon!) Warm, mellow, velvety tone