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Key/Reed and Stop Boards
The picture below shows the bottom side of the key/reed board of a Delhi style harmonium, from the back of the instrument. The key/reed board hinges from the front of the instrument. The keys are above the reeds.
Below the key/reed board is the ‘stop' board. The rods attach to the knobs on the front of the instrument and when pulled, uncover the holes which connect to the bottom bellows, allowing air to flow across the reeds and into the chamber where the stops are.
In this case it is the chamber for the male reeds. Out of the picture at the bottom is the chamber for the bass reeds, with the control rod at the right side of the picture. Leather is used to seal each chamber.
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