Best Brass Warm-Up Aluminium Trumpet MuteThe Warm up reduces instrument output to a whisper, losing approximately 25dB to 35dB. With this high level of sound reduction, professionals have no hesitation in practicing in a hotel room during their tour, and it becomes possible to do long tones virtually silently backstage, or even gear up for that high section in the pit or on the bandstand. One of the reasons that the Best Brass Warm up is endorsed by many professionals is that it's very