Construction of the Pipe Organ
The mighty pipe organ is an instrument that delivers music by continually pushing pressurised air through pipes selected by a keyboard. Each and every pipe sits atop a box known as the wind chest that’s filled with compressed air delivered by a bellows or blower. The wind chest also contains valves which are connected to the key board. These valves make it easy for air to flow to every pipe. Every time a key on the keyboard is pressed, condensed air goes into the pipe and a sound is created.
The organ’s steady supply of wind flow makes it possible for it to maintain notes for as long as the corresponding keys are depressed, giving the organ its incomparable sound. When a note is played on an instrument with a string, the string vibrates to make the note sound. An organ pipe possesses the same characteristic as a vibrating string, except it’s a vibrating column of air. Because the harmonic structure of the organ is so highly developed and it can sustain its tone unlike a guitar, piano, or drum, it makes the organ a good piece of equipment to complement music and singing.
An organ also has an important part called a stop. This permits or stops compressed air to travel to the pipes. The organist can use stops to generate different mixtures of sounds. Most stops belong to one of two types: Flue or reed stops. The pipes of a flue stop are set in place by a whistle. The majority of the pipes of a pipe organ are flue pipes. The pipes of a reed stop are induced by a beating reed.
A pipe organ can have one or more keyboards, also called manuals, played by the hands, plus a pedalboard played by the feet, each of which features its own band of stops. Just about every key on your pipe organ manages a note which can be sounded by several pipes, frequently on their own or in combination.
The actual organ pipes are constructed from possibly wood or metal. The organ could have many sets of pipes; every one of these teams of pipes is termed a “rank”, that makes unique notes. Every rank features a common timbre and volume throughout the keyboard. Ranks of pipes are organized into groupings known as divisions. Each and every division generally is played from its own keyboard and includes an individual instrument within the organ. A large number of organs have various ranks of pipes of differing timbre, pitch and loudness which the organist regulates through stops. For a particular pipe to sound, the stop controlling the pipe’s rank has to be engaged, and the key complimenting to its pitch need to be depressed. As one pipe creates a single pitch, multiple pipes are needed to accommodate the musical scale. The pitch produced by an organ pipe is determined by its length. Longer pipes create reduced pitched notes, whereas smaller pipes are higher in tone.
Pipe organs range in size. The smallest portable pipe organs may have only one or two dozen pipes and one manual; the largest may have over twenty thousand pipes and 7 keyboards. A lot of the premier instruments have sixty fourfoot pipes.
Pipe Organ Constructing
Every individual organ is different from the next. Each organ is tailor made for the buyer, and in each instance several parameters have to be attended to. Things to consider for the new organ might involve the number and types of sounds included, the actual size of the room where the organ will besituated, the physical look and style of the organ as well as budgeting cost.
The pipe organ trade consists of close to 50 firms that assemble new pipe organs and repair aged instruments. Between 100 and 120 new pipe organs are built each year in the United States and all of North America.
Pipe organs tend to be found primarily in church buildings, but also social and live concert halls, universities, synagogues, other general public properties as well as in private homes. Pipe organs are used in the performance of classical music, holy music, and secular music and songs.
Additional resource: Church Organ Builders