trumcor zinger harmon-style trumpet mute trumcor zinger harmon-style trumpet mute. with the introduction of trumcor's latest offering, the zinger, everything you thought impossible in a harmon-style mute has now become a reality. pitch, articulation, slotting, comprehensive range, dynamic projection, and a beautiful sound are now all part of the harmon-style mute dialogue. trumcor's overriding philosophy of uncompromised playability has been elemental in the four-year development of the zinger!. we began from scratch to develop solutions in design and manufacturing techniques to create a mute with unlimited performance potential. the zinger! allows the performer to experience complete freedom of expression and technique throughout the dynamic and tonal range of the trumpet, all while maintaining a consistent pitch center.