Best Brass e-Sax i Alto - electronic mute system for alto saxophone; it s a exclusive soundproof "studio" where nobody can bother the player; e-Sax i reduces saxophone output at approximately -25dB while maintaining the full tonal characteristics of the instrument; it is still the best muting performance in the world since e-Sax was born in 2005 as the world's first silencer for saxophones; Best Brass "e" App (free to download) will add full of useful functions to e-Sax i and provides users unprecedented new experience; built-in microphone picks up the sound inside the e-Sax i, so most of the surrounding sound are cut; effects are fully controllable; find the best setting, and make the performance more fun and comfortable; built-in Metronome is not only for rhythm training but also useful for recording; it´s possible to instantaneously sync the recorded file to iCloud Drive; no complicated DAW or A I/F are required to enjoy overdubbing performance or solo ensemble; let s create your music with e-Sax i, and share it on social media; it is like you are getting your exclusive studio where nobody can bother and of course, not bother your neighbors, too; no batteries required