I really love this mute. Its sound is marvelous with alot variety at your disposal, depending on your need / mood / felling ... By pulling out the pin, or pushing it deeper in the mute, the sound will change tremendously, and by covering the hole ( or not / or a little / or alternating ...) you can get disired affect such as the wah wah / crying baby ) Simply the best wah wah for me :)