sentence: Most organs have at least two.
sentences_after: In English and American Organs the lower manual is the main one and is called the 'Great'. It is in the centre just above the pedal board. On old English organs the swell box is operated by a lever at the side. This is quite difficult to use. Most of these have now been replaced by central swell boxes.
concept_name: organ
headings: Pipe organ The technical details The manuals
categories: Keyboard instruments Former good articles