The Yamaha SB7J SILENT Brass system for trumpet consists of a smaller, lighter, freer blowing Pickup Mute, as well as 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. The updated STJ Personal Studio module allows you to connect to a computer or smart device via a supplied cable to allow you to record or take part in online lessons at home without the need of an audio interface.