Windsavers are valves used in instances wherein two reeds are in the same cell and there is frequent unnecessary air passage through the non-playing reed. The cover plate protects the reed-plates. This could be made of wood, plastic, or metal. The two types of cover plates are those with the traditional open design and those with enclosed designs. Saxophone maintenance The usual sax consists of brass and leather. This indicates that it requires extreme care because brass can easily be dented and leather deteriorates fast if in the wrong environment. Moisture tends to build up in the horn when playing the sax. This will make the leather pads rot and the brass to rust. Snare drums with a smaller diameter have higher pitch and those that are longer have more shell resonance and power. This instrument regularly has a diameter of 14 inches. Playing the snare drum The snare drum is played by striking using a drumstick or another kind of beater. The drummer may choose to strike the head, the rim, or the shell. Some guitars have a higher volume compared to others but it does not mean that these guitars produce better sound output. There are many other qualities to consider. Calling a guitar balances means that all of its notes have the same level of power. The guitar should not have too much midrange. The dynamic range is the ability of the guitar to easily switch from very loud to very soft. Playing the sitar The instrument should be placed between the player s right knee and left foot with the left leg under the former. This position allows the player s hands to move freely without holding the sitar s weight. The thumb is positioned on the fretboard s top while the string is being plucked using a mizraab or pick. Trombone The trombone is a wind instrument that is a member of the brass family. The differentiating characteristic of the trombone is a telescope-like slide which is controlled by the player to change pitches with the exception of the valve trombone with three valves. Similar to other brass instruments, the vibrating lips of the player makes the air inside the trombone to vibrate and this produces sound.