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Each kora is different, especially in dimensions… so as the bridges.
They can have some standard dimension, for example in length, but usually this are variable.
African varieties of wood are the original and most used types for building kora bridges.
But you can use also other wood, like fir, walnut or ash…
Personally, I use and suggest beech wood…
An important caratteristic of the kora wooden bridge is its strenght and hardness… for me is better an hardness wood than on soft: this help the strings’s vibrations.
Another good characteristic of the kora bridge, that is recent, is an hole in its middle.
One or more holes in the bridges reduce the wooden’s surface, so there is major transmission of the vibrations between the strings and the skin of the calabash.
It’s then important a right distance between each string, so you can play easily the kora, but this depends also on the size of your hands.
A good distance, for my hands, its around 1cm between each string’s dent (nick, kerf) on the bridge… so my personal bridge it’s around 14/16cm in lenght (with the final wood head).
How must a kora bridge width be?
Also this, depends on your hands and on the space you’ve from the hand’s sticks… can be personal and variable.
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