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In the G major key all F’s at whatever pitch must be played as F# and not F. Similarly if a melody is written in the key of G major the key signature will include one sharp, namely F#. This means that all B’s at whatever pitch must be played as Bb and not B.

If a melody is written in the key of F major the key signature will include one flat, namely Bb. The following shows the key signatures for these keys using the bass clef: The following shows the key signatures for these keys using the treble clef: In grade 1 you will need to know the key signatures of C major, F major, G major and D major. To understand why key signatures are required and their use, study the module on the Major scales. A melody written in the key of ‘C’ will have no sharps or flats in it’s key signature. However if a melody is written in the key of ‘G’ there will be one sharp as its key signature. Key signatures relate to the number of sharps or flats at the beginning of a piece of music. * It is advisable to read the following modules before attempting questions on key signatures:

D flat major scale key signature