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1. We label pitch-classes by the use of letter- names. Other From these two fixed points, all other pitches were calculated and placed on the Figure 2.5 Pitch Placement on the Grand Staff
2. This helps reduce the need for accidentals (i.e. placing a flat or sharp before a note in the music every time it occurs). Now, there are some important rules to know about key signatures. A key signature is made up of sharps or flats, not a combination of the two
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