Key signatures in music represent the number of sharps and flats that are "common" throughout a piece of music. For example, a piece of music written in G major will have one sharp (an F sharp). The musician assumes that any F he or she encounters is sharp, unless the music specifically says otherwise!
Key signatures, like time signatures, are also easy:
In the first example, to combine the key signature with the time signature, the braille would be:
Again, this information is normally centered above the first line of music.
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