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A pipe organ contains one or more sets of pipes, a wind system, and one or more keyboards. The pipes produce sound when pressurized air produced by the wind system passes through them. An action connects the keyboards to the pipes. Stops allow the organist to control which ranks of pipes sound at a given time.
Electro-pneumatic action. The electro-pneumatic action is a control system by the mean of air pressure for pipe organs, whereby air pressure, controlled by an electric current and operated by the keys of an organ console, opens and closes valves within wind chests, allowing the pipes to speak. This system also allows the console to be ...
Organ console. The console of the Wanamaker Organ in the Macy's (formerly Wanamaker's) department store in Philadelphia, featuring six manuals and colour-coded stop tabs. The pipe organ is played from an area called the console or keydesk, which holds the manuals (keyboards), pedals, and stop controls. In electric-action organs, the console is ...
An organ that utilizes tubular-pneumatic action is commonly called a "tubular-pneumatic organ". It seems the first use of this action was in 1851, in Willis' Great Exhibition organ, though it was only very limited. It appears that the first organ using tubular-pneumatic action throughout was by T.C. Lewis at St Andrew's Hall, Glasgow, in 1877.
Tracker action is a term used in reference to pipe organs and steam calliopes to indicate a mechanical linkage between keys or pedals pressed by the organist and the valve that allows air to flow into pipe (s) of the corresponding note. This is in contrast to "direct electric action" and "electro-pneumatic action", which connect the key to the ...
Barker lever. The Barker lever is a pneumatic system which multiplies the force of a finger on the key of a tracker pipe organ. It employs the wind pressure of the organ to inflate small bellows called "pneumatics" to overcome the resistance of the pallets ( valves) in the organ's wind-chest. This lever allowed for the development of larger ...
The pipe organ is a musical instrument that produces sound by driving pressurised air (called wind) through the organ pipes selected from a keyboard.Because each pipe produces a single pitch, the pipes are provided in sets called ranks, each of which has a common timbre, volume, and construction throughout the keyboard compass.
The organ's wind supply is the most powerful ever used in a pipe organ. The DC motors for the original eight blowers had a total power of 394 horsepower (294 kW). These were replaced with AC motors in the early 1990s, which have a total of 600 horsepower (450 kW) and their seven blowers pump 36,400 cubic feet (1,030 m 3) of wind per minute. The ...