Brass instruments can have valves or a slide, but not reeds. Brass instruments create sound by the vibrating of the player's embouchure in a mouthpiece, and the valves and slides on the instrument change the length of the tubing in the instrument which affects the pitch of the notes produced. Reeds are used in woodwind instruments to vibrate to produce a sound instead of using a mouthpiece like in brass instruments.
Brass instruments produce sound by the vibrating of the player's embouchure in a mouthpiece, and the valves and slides on the instrument alter the length of the tubing in the instrument which affects the pitch of the notes produced. The farther the air has to travel in the instrument the lower the pitch of the sound is, whereas the less distance the air has to travel the higher the pitch the instrument will produce.
A Bugle is a brass instrument without valves.Bugle
A Bugle is a brass instrument without valves.Bugle
Brass instruments may have:valves (trumpets, baritones, tubas, cornets, susophones)slides (trombones)keys (horns)nothing (natural trumpets)
Trumpet.
The brass instrument that has no valves is the trombone. Instead of valves, it uses a sliding mechanism to change pitches, allowing for a smooth transition between notes. This unique feature distinguishes the trombone from other brass instruments that utilize valves to alter their pitch.
Neither it is a woodwind instrument and has keys. Do you mean the soprano cornet? This is a brass instrument which has piston valves.
Not all brass instruments have valves. For example, the trombone has a slide. The trumpet, euphonium, and french horn have three valves.
Trombone
Brass instrument have valves to change the length of tubing that the air passes through. This allows the instrument to play different notes of various harmonic series.
I'm no brass instrument, but rotary valves are used for several instruments. French horns all seem to have them. They're pretty common on tubas as well. There are even some rotary valve trumpets out there. I don't know, though, anything about the advantages and/or disadvantages of rotary valves as opposed to the piston valves that seem to be more common for most brass instruments.