With the shutter board removed we can now view the reed
banks. Understandably, the reeds must be in good condition or
they just won't work. It doesn't take very much to stop a reed
from playing. To give you an idea, if an object one tenth the
size of a pin head became lodged in a reed, it would stop
playing.
The empty hinges (on the left) are designed to hold two
long, narrow pieces of wood that cover the reed chambers when
the organ is not in use. The area of the boards that actually
makes contact with the reeds is covered with a soft, plush
leather in order to make the reed chambers air tight.
However, the primary function of these boards is to control
air flow. There are usually one or two stops that control each
board. These boards are called "mutes," because if they're not
open, no sound will come from the reeds. If the mutes are open
just a small amount, you will get one sound, if they're opened
a little bit more, a slightly different sound will be heard..
So from just one reed we can produce several sound
variations.
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