On a brass instrument, a valve is a mechanism that, when in use, directs the air column along additional tubing inside the instrument, thus producing a different fundamental and harmonic series.Most modern valved instruments employ similar valve systems which results in the same patterns of valve combinations to alter a pitch. For example, depressing the first valve will normally result in lowering the original pitch by one step, or the interval of a second. The table below shows the valve combinations of a typical valved instrument and the resulting pitch alterations. It should be noted that the addition of the fourth valve became common in the mid-20th century to help produce better intonation with the third valve combinations that tended to be "out of tune" or having poor intonation (especially the 1st & 3rd valve combination). Valves can be created in a rotary or piston configuration.See also rotary valve, piston valve.Valve CombinationsPitch Lowered2nd Valve1/2 step1st Valve1 full step3rd Valve1 & 1/2 steps1st & 2nd Valves1 & 1/2 steps2nd & 3rd Valves2 full steps1st & 3rd Valves2 & 1/2 steps1st, 2nd, & 3rd Valves3 full steps4th Valve Combinations'4th Valve2 & 1/2 steps2nd, & 4th Valves3 full steps1st, & 4th Valves3 & 1/2 steps3rd, & 4th Valves4 full steps1st, 2nd,, & 4th Valves4 full steps2nd, 3rd, & 4th Valves4 & 1/2 steps1st, 3rd, & 4th Valves5 full steps1st, 2nd, 3rd, & 4th Valves5 & 1/2 stepsAnimation of the trumpet valves.device for diverting the air flow in a brass instrument away from a section of the main tube and into a tube of a different length, giving a different pitch<br><br>A mechanical device for adding, virtually instantaneously, a fixed length of tubing into the windway of an instrument. Most valves are `descending valves' which add to the air column length when operated; with the rarer `ascending valve' the air column is longer when the valve is not operated

Your data and time are valuable. There's a new web browser that considers your time and security as a top priority.

Download Brave Browser For Free!

Brave uses the latest in blockchain technology.

This ensures a higher quality and more secure experience. Learn more about this fantastic breakthrough.

Loads Content Up To 8X Faster

Because Brave blocks unwanted tracking scripts that run in the background, your browsing speed will be unparalleled.

Ultimate in Privacy & Security

Brave fights malware and prevents tracking, keeping your information safe and secure.