The organ in the Wren Chapel has a single keyboard, a single mechanical pedal, and five-and-a-half ranks of pipes, each having its own characteristic and sound quality. Nine stops allow the organist ...

A large modern organ typically has three or four keyboards (manuals) with five octaves (61 notes) each, and a two-and-a-half octave (32-note) pedal board. How to play Pipe organs use wind moving ...