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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.
In the simplest mechanical actions, a tracker is attached to a key and leads directly to the pallet it controls. In the diagram to the left, a key is shown (from the side) with its pivot point located at its farther end ( B ).
Tracker action, in music, on the organ, mechanical system that transmits the organist’s action in depressing a key to the pallet valve that admits air into the pipes that the key controls. It consists of cranks, levers, and trackers (thin strips of wood connecting, under tension, parts of the organ.
The Grand Organ. The Sydney Opera House Grand Organ is the world's largest mechanical tracker-action pipe organ. It is located in the concert hall of Sydney Opera House in Sydney, Australia, and was designed by Ronald Sharp, who was assisted by Mark Fisher, Myk Fairhurst and Raymond Bridge.
A "normal," traditional slider chest is usually assumed when we talk about "tracker organs," or "mechanical action." In fact, that's what the single M means when you see that abbreviation used; it stands for mechanical action, and such organs almost without exception in today's world are built with slider chests.
MECHANICAL (“TRACKER") key action, the oldest type, features a mechanical connection from the key to the valve (or "pallet"). This action is usually designed with lengths of wooden "trackers" and roller bars to distribute the action to the proper pipe.
Mechanical (“Tracker”) Key Action. Before the introduction of electricity in pipe organs, air was supplied by large bellows driven by human hands and feet. As air was supplied to the pipe, it was let in by the pressure of an organist's finger on the key.
A mechanical action Ruffatti organ utilizes truly innovative materials and advanced techniques which allow us to achieve such results. The Tracker Connections. Traditionally, the tracker connections between keys and windchests have been made with metal wires or thin slices of wood, called “trackers”.
Apr 8, 2010 · Tracker action is also referred to as mechanical action on pipe organs, as opposed to electrical. It's a similar comparison to a manual typewriter and electric typewriter. In one, the keys are connected to each individual letter: In the other, electric components tell the typewriter which letter to type:
Ronald and others worked painstakingly for ten years to build the Grand Organ, which consists of 10,244 individual pipes and is the largest mechanical tracker-action pipe organ in the world. British organist and composer Peter Hurford is featured in the film, playing the instrument.
