Voigt Brass Mute Euphonium Product Description from HP: The long-awaited euphonium mute from Voigt Brass Mute, known for their horns, is now available. Highly praised for its excellent intonation and playability! Please give it a try!! I tried it out, but it seems I won't be using it anytime soon, so I'm putting it up for sale while it's still in good condition, hoping someone else can use it.