Yamaha silent brass mute system for tubaYamaha SB1K Silent Brass Tuba Mute Pickup Mute The Pickup Mute combines a high performance mute with an internal microphone to pickup sound. Lightweight and Compact The new SILENT Brass Pickup Mute is designed to be significantly smaller and lighter than previous models to improve the balance when playing, yet it offers approximately the same muting efficiency along with stable pitch over a wide range and unrestricted breath flow. Adjustable Pitch and