brass instrument conical-bore shape three-valve design bell-front shape two large rotary valves a tuning slide three pistons three mouthpieces a wide range of sound capabilities
euphonium which has brass instrument euphonium which has conical-bore shape euphonium which has three-valve design euphonium which has bell-front shape euphonium which has two large rotary valves euphonium which is a tuning slide euphonium which has three pistons euphonium which has three mouthpieces euphonium which is a wide range of sound capabilities