Best Brass controls tone at will by creating and developing various Sound Transformers.
There is a musical accessory called a "Mute". The mute has two purposes
Essentially mute means in English "making no sound, weaken a sound" but in music world it means "a pad, clip, or other device used to reduce or alter in some way the tone of a brass or stringed instrument.

Then, we thought about it, and realized that both of these devices transform sound. This is why we call them "Sound Transformer".
Sound Transformer has infinite of possibilities.