Yamaha’s next generation SILENT Brass delivers greater playing enjoyment, anytime, anywhere.
The new SILENT Brass consists of a smaller, lighter, freer blowing Pickup Mute, and the Personal Studio, which features Yamaha’s exclusive Brass Resonance Modeling.
Used together, the two deliver the natural acoustic tone you hear when playing without a mute, making it feel as though you are playing mute free.
See more: https://usa.yamaha.com/products/musical_instruments/winds/silent_brass/index.html