What is a pipe organ?

A pipe organ is a musical wind instrument that produces sound through pipes, with the “wind” supplied by pumping bellows. The pumped air travels through a passage called a wind trunk to the wind chest in the body of the organ case.  The wind chest pushes the air through the pipes, with amount and distribution controlled by the organist at the console, pictured above. The console includes keyboard, pedals, and stop knobs that open and close various sets of pipes, allowing the organ to produce a large variety of sounds.

Photo courtesy the Eastman School of Music