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Constant alterations
Constant alterations are determined through tone (that is, not belonging to the scale) and are set at the beginning of the music line right after the clef and alter all the notes with the same name, from grave to high, the whole music text, unless you find another indication of a constant alteration.
In the following example you find two flats after the clef, the first one on the line belonging to the B and the second one in the position of the E, therefore all the Bs and the Es of the music text will be considered as flats.
Constant alteration 1
The signs of constant alterations build the clef framework and are repeated at the beginning of each music line. To annul the effect of the constant alteration you use the natural which turns the altered note back to its natural state.
The maximum amount of constant alterations is seven and they follow in a progression of fifths, ascending from the first note F for sharps and descending from the note B for flats.
Constant alterations with sharps:
Constant alteration 2
Constant alterations with flats:
Constant alteration 3

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