Page 60 - Chorister's Companion
P. 60

                                                                  Musical skills and understanding
Accidentals
The #, b and  signs that are found in a piece of music are called accidentals.
The # sign raises the note that follows it by one semitone [half-step].
The b sign lowers the note that follows it by one semitone [half-step].
The  sign cancels any previous # or b signs, bringing the note back to its original pitch.
An accidental lasts until the end of the bar [measure]. For example:
12
   
1 is an F# because it is affected by the # sign that
appeared earlier in the same bar [measure].
2 is an F  because it is no longer affected by the # sign that appeared in the previous bar [measure].
If you wanted to naturalise an accidental within the same bar [measure], a  sign must be added:
                      
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