Denis Wick Practice Mutes are perhaps the best teaching aid ever invented. Not only do the Denis Wick Mutes fulfil the need for the 'in tune' painless practice, but they're also an indispensable 'hotel mute' for the professional. The Denis Wick Baritone Practice Mute are great for those who are starting out, forcing the player to better utilise their air and providing an enormous improvement in tone quality.