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The pipe organ is a big box of whistles. Each pipe sits on top of a hollow wind chest that is filled with compressed air provided by a bellows or blower. Each ‘stop’ at the organ console represents a set of pipes (a rank) of a particular tone color, with a different pipe for every note on the keyboard. Pulling the stop activates a slider under that specific set of pipes on the windchest, making them available as a sound-source. The wind chest also contains a series of valves (pal

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Pipedreams - How a Pipe Organ Works

pipedreams.publicradio.org

à partir de L'Histoire de France

Description de la cathédrale de Notre-Dame de Paris

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Description de la cathédrale de Notre-Dame de Paris

histoire-france.net

Notre Dame de Paris

Épinglé à partir de

solopassion.com

Notre-Dame de Paris

Épinglé à partir de

monquotidien.fr

Les grandes cathédrales françaises

Épinglé à partir de

webmail.laposte.net